I wanted a 4 seat too but didn't see it coming from Van's back in 1999.
I've been building the M14p powered Moose since the beginning of time...99. Most of it is flush solid riveted where I could get to it and flush Avexed where I couldn't. Doubt it'll help much speed wise. It's a fat wing. 4415 airfoil. Hoping for 130kts cruise. Soft thin 6061 T6 is not fun to solid rivet. I know after driving 38,000 rivets. Lots of stringers and close rivet spacing.
Finally getting close. I think Murphy's stuff is pretty self explanatory and simple. Support was fine. Don't know what they're like now that Darrel's in it again? He always seemed like a good guy to me. Some customers cannot be satisfied no matter what! I'm sure Scott McDaniels can testify to that
Always thought Van's was designed more like a certified plane though.
If you do build one, use the pops!