Thanks, Bob - I'll have to do that. First I think I'll measure from the front ring of the fuse back to the firewall, just to double check that I'd end up with the proper mounting depth for the TTpro.

I flew a friend's sport quarter .40 over the weekend, and it would make a great plane to fly at the local field, without scaring everyone completely off! Our locals are getting used to our 424 planes.. the Jett quickies startle them somewhat with the RPM, can't imagine what a full blown Q40 would do!