I've found a version of the Samplerbox code called Samplerbox2 from someone called nickyspride.nl. I would like to try this version out but to do so means having to install effectively binary patches to the normal Samplerbox code and I am hesitant to do that without knowing what the patches do. Is there a source tree somewhere that I could look at to see how these upgrades work and what the patches do?
Well, Erik installed freeverb and adapted samplerbox_audio.pyx for creating the accurate velocity. He also changed samplerbox.py, but that does not result in binaries.
So the only "suspicious" binary is the samplerbox_audio.so, which was created from samplerbox_audio.pyx included with his package.
So you can delete the binaries you don't trust and regenerate them yourself after adapting if necessary.