diff --git a/README.md b/README.md
index 86b6c29..3c32ebe 100644
--- a/README.md
+++ b/README.md
@@ -600,7 +600,7 @@ With a given enum, search and call user supplied invocable. A typical use case w
 for different enum values.
 
 - Where invocable returns a value, return this value or a user supplied "not found" value.
-- Where invocable is void, call user supplied "not found" invocable.
+- Where invocable is void, call user supplied invocable or "not found" invocable (last in supplied array).
 
 The first parameter of your invocable must accept an enum value (passed by `dispatch`).
 Optionally provide any additional parameters.
@@ -2048,7 +2048,7 @@ From a compilation performance perspective, `conjure_enum` roughly matches the p
 | :--- | :--- | :--- | ---: |
 | [gcc](https://gcc.gnu.org/projects/cxx-status.html) | `11`, `12`, `13`, `14`| `std::format` not complete in `11`, `12` | `<= 10` |
 | [clang](https://clang.llvm.org/cxx_status.html) | `15`, `16`, `17`, `18`| Catch2 needs `cxx_std_20` in `15` | `<= 14` |
-| [msvc](https://learn.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance) | `16`, `17` | Visual Studio 2019,2022, latest `17.11.2`| `<= 16.9`|
+| [msvc](https://learn.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance) | `16`, `17` | Visual Studio 2019,2022, latest `17.11.3`| `<= 16.9`|
 | [xcode](https://developer.apple.com/support/xcode/) | `15` | Apple Xcode Clang 15.0.0 (LLVM 16), some issues with `constexpr`, workarounds| `<= 14`|
 
 # 11. Compiler issues
diff --git a/examples/example.cpp b/examples/example.cpp
index ec8188d..9f36e7d 100644
--- a/examples/example.cpp
+++ b/examples/example.cpp
@@ -257,5 +257,12 @@ int main(void)
 	for (const auto& [ev,str] : {en::front(), en::back()})
 		std::cout << static_cast<int>(ev) << ' ' << str << '\n';
 
+	enum_bitset<numbers> ee;
+	ee.set();
+	std::cout << ee << '\n';
+	std::cout << ee.count() << '\n';
+	std::cout << ee.get_underlying_bit_size()  << '\n';
+	std::cout << ee.get_bit_mask() << '\n';
+	std::cout << ee.get_unused_bit_mask() << '\n';
 	return 0;
 }
diff --git a/include/fix8/conjure_enum_bitset.hpp b/include/fix8/conjure_enum_bitset.hpp
index fc1f9dc..75c4d24 100644
--- a/include/fix8/conjure_enum_bitset.hpp
+++ b/include/fix8/conjure_enum_bitset.hpp
@@ -71,7 +71,7 @@ class enum_bitset
 				 std::conditional_t<countof <= 64, std::uint_least64_t, void>>>>;
 	static_assert(std::integral<U>, "requested bitset overflow");
 
-	static constexpr U all_bits { (1 << countof) - 1 };
+	static constexpr U all_bits { (std::size_t{1} << (countof & (sizeof(U) * 8 - 1))) - 1 };
 	static constexpr U unused_bits { sizeof(U) * 8 - countof };
 
 	template <typename R>
@@ -116,7 +116,7 @@ class enum_bitset
 	using const_reference = _reference<const enum_bitset>;
 
 	explicit constexpr enum_bitset(U bits) noexcept : _present(bits) {}
-	explicit constexpr enum_bitset(std::bitset<countof> from) : _present(from.to_ullong()) {}
+	explicit constexpr enum_bitset(std::bitset<countof> from) : _present(U(from.to_ullong())) {}
 	constexpr enum_bitset(std::string_view from, bool anyscope=false, char sep='|', bool ignore_errors=true)
 		: _present(factory(from, anyscope, sep, ignore_errors)) {}
 
@@ -143,9 +143,9 @@ class enum_bitset
 	{
 		if (std::bit_width<U>(_present) > 32)
 			throw std::overflow_error("overflow");
-		return _present;
+		return static_cast<unsigned long>(_present);
 	}
-	constexpr unsigned long long to_ullong() const noexcept { return _present; }
+	constexpr unsigned long long to_ullong() const noexcept { return static_cast<unsigned long long>(_present); }
 	constexpr U get_underlying() const noexcept { return _present; }
 	constexpr int get_underlying_bit_size() const noexcept { return 8 * sizeof(U); }
 	constexpr U get_bit_mask() const noexcept { return all_bits; }
@@ -394,9 +394,9 @@ constexpr enum_bitset<T> operator^(const enum_bitset<T>& lh, const enum_bitset<T
 template<typename T>
 struct std::hash<FIX8::enum_bitset<T>>
 {
-	size_t operator()(const FIX8::enum_bitset<T>& bs) const noexcept
+	std::size_t operator()(const FIX8::enum_bitset<T>& bs) const noexcept
 	{
-		return std::hash<typename FIX8::enum_bitset<T>::enum_bitset_underlying_type>()(bs.get_underlying());
+		return std::hash<std::size_t>()(bs.get_underlying());
 	}
 };
 
diff --git a/utests/unittests.cpp b/utests/unittests.cpp
index 278794f..815af1e 100644
--- a/utests/unittests.cpp
+++ b/utests/unittests.cpp
@@ -52,7 +52,7 @@ enum class range_test1 { first, second, third, fourth, fifth, sixth, seventh, ei
 enum class range_test2 { first, second, third, fourth, fifth, sixth, seventh, eighth };
 enum class range_test3 { first, second, third, fourth, fifth, sixth, seventh, eighth, ce_first=first, ce_last=eighth };
 enum range_test4 { first, second, third, fourth, fifth, sixth, seventh, eighth, ce_first=first, ce_last=eighth };
-enum class numbers64 : uint64_t
+enum class numbers64
 {
 	zero, one, two, three, four,
 	five, six, seven, eight, nine,
@@ -691,7 +691,7 @@ TEST_CASE("enum_bitset <==> std::bitset")
 	std::bitset<10> bs{1 << 1 | 1 << 3 | 1 << 6};
 	enum_bitset<numbers> ed(bs);
 	REQUIRE(ed.to_ulong() == (1 << 1 | 1 << 3 | 1 << 6));
-	std::bitset<10> bs1{ed};
+	std::bitset<10> bs1{ed.to_ulong()};
 	REQUIRE(bs1.to_ulong() == (1 << 1 | 1 << 3 | 1 << 6));
 }
 
@@ -742,7 +742,7 @@ TEST_CASE("enum_bitset ops")
 	ed.set<numbers::one,numbers::three>();
 	REQUIRE(!ed.has_single_bit());
 
-	REQUIRE(std::hash<enum_bitset<numbers>>{}(ed) == 14);
+	REQUIRE(std::hash<enum_bitset<numbers>>{}(ed) == std::hash<std::size_t>()(14));
 }
 
 //-----------------------------------------------------------------------------------------