I wouldn't worry the least bit about the 912, Super Trooper; my prime concern in your situation would be the construction documentation, workmanship quality and current condition of the airframe it's mounted in. If all that meets the approval of your EAA buddy, who, hopefully, is up to speed on the "Foxiness of Kits," you may have found the best of all combinations in an experimental aircraft. No kiddin'.
I finished my Model IV Speedster in 1999 and flew it just days after my 50th birthday. The 80-horse 912 has been in it since 2000 when I replaced the original Rotax two-stroke, courtesy of Desert Fox 3, who was upgrading to the ULS (Thank You Ray!) and I've never looked back. It had 1400+ trouble-free hours on it when some knot-head taxied into me three years ago, bending one of my IVO prop blades 90 degrees backward while destroying his own wooden Sensenich and attached Continental engine! (That'll teach him!)
Our local "Rotax Guru" actually zero-timed the engine upon tear-down inspection; the multi-piece crank was understandably a bit "crankier" than it should have been, and was promptly replaced, but the rest of the engine was otherwise undamaged: Unbelievable! I reinstalled it rather than replace it with the 100-horse. Why? Didn't need the extra ponies, price or fuel burn for the negligible increase in performance that MAY have appeared. That little beast is going to stay right where it is, under my Speedster's cowl, for the rest of its life: Unbelievably tough, dependable, trouble-free and as close to "turn-key" touring as you're going to find in an aircraft engine: That's the heritage of the Rotax 912.
You'll find plenty of support for this opinion of the 912 among the "Kitfox Krowd" on this forum, for sure: Bombardier hasn't sold a zillion of them for no good reason at all, lemme tellya, but there's a deeper, almost "religious" experience that goes with it.
If you don't believe me, you've obviously never heard Desert Fox 4 recite his "Prayer of the Rotax Tabernacle Choir" over VHF on a Sunday morning patrol of the Desert Fox Squadron enroute to Sedona for breakfast!
11 years, 1500+ hours and still purring...
"E.T."
(Franklin? Franklin?? Don't they make stoves?)