Guys, I'm building a MPS K5 hybrid right now. In fact, I just got off the phone with George about a mix-up on my pipe I vented about over on my 500AF thread (1990 KX 500 to 06 KXF 450 Kwackerman). He's beinding over backward to make this right. It seems Dynoport misstamped my pipe and I actually got a 250 pipe and some guy in canada got my 450 pipe for his 250.
I've been working with George since late October and he's been very agreeable and responsive. I like my frame and you can see tons of picks on my thread of all his work. It's not factory, but the welds are all good and strong. I haven't completed the bike and ridden it yet, but I should have it running within another week and I'll post final pics and a ride report over on my thread.
I've read a lot about George and comparing my experience with him to what I've read, I believe the guy is trying to produce a quality product and be more customer oriented.