I can't really answer your question because wIth Synchron Percussion I've used only the Close mic, adding MIR for reverb. That way it mixed nicely with my other VSL instruments, and I had no problems with the baked-in reverb pulsating.
About the problem with "baked-in reverb" pulsations ...
If you or someone else has Synchron Percussion, is this a problem there at all?
Bruno in his post mention Synchron percussions. But I'm sorry I don't own them, just Synchron Strings. (My personal post was about strings indeed, sorry for being unclear), I have no experience with Synchron percussions, so maybe Bruno can comment about your question.