Dear Sir,   CRJ doesn't use specific FSUIPC offsets. Some very common offsets may work, other won't.   It uses L-Vars. See the list attached. I think there is a way of adressing L-Vars from within FSUIPC with LUA This Mobiflight post could be interesting for you maybe :  https://www.mobiflight.com/forum/topic/2319.html   Best regards. CRJ-LVARS.txt