Used Rotax 503's/Rotax Rick-anyone heard of him? Advice?

[Super Glide]

Good morning everyone. Has anyone had any dealings with this supplier
of used and rebuilt Rotax engines? Looking for good 503 for my Kolb
Firestar. Thanks for any and all advice!

[Dana]

I have no personal experience with him, but there's been some discussion over on homebuiltairplanes.com and people seem to speak highly of him.