Have you tried this one?
And this one, scroll down the page a bit and look for the Clav 1
Tricky clav is the best of the free. It's only 32bit though.
I did try tickyclav, but it just didn't sound good to me. Maybe I'll try spending some more time with it, or add some processing. Thanks :)
What sound system do you use? if it's the computer's internal sound, and you are using Windows 10, I suggest disabling all the sound enhancements such as EQ, Environment and especially Loudness Equalization, this will ensure a true sound, but then again, try to use ASIO which bypasses any of the Windows sound devices and talks directly to the sound hardware, but there is a price when using ASIO4ALL, you can not use any other sound device while using ASIO4ALL, as ASIO takes control of the hardware, but using ASIO you get a true sound coming from your DAW without any enhancements between the DAW and the speakers, and you hear exactly what your DAW sends out.
I used to use ASIO with Cakewalk Sonar X3 and there is a huge sound difference when using ASIO and using Windows drivers.
I have loads of free VST's and some are crap, but the VSTi's such as a VSTi for the Hammond B3, sound so realistic that you would think an actual Hammond was being played.
Check out his:- https://fredjones.bandcamp.com/track/red-river-rock-quarter-masters-stores-back-2-back-cover-tunes
Was the keys played using an actual Hammond or a VSTi?
And was this one performed with an actual guitar or a VSTi?
Well, I'm running on an older pc, win 7, on-board sound, asio4all driver - which all works 99.5 percent of the time. But from what I've been reading about Windows 10 I am glad I don't have all of those problems :)