I love apTrigga, but you cannot use random multisamples are multiple velocities with it, which makes it a real pain in the ass for doing full on replacement. You either set it to random where you get a bunch of multisamples that are all the same velocity layer, or dynamic, where you only get one sample per velocity layer.
Is there a free sampler out there that will trigger velocity sensitive multisamples from MIDI? I convert all my drums to MIDI for triggering anyways and use the SSD plugin, but it would be nice to be able to do the same with non-SSD samples.