I have a spare 1100 and 1500 laying around and this looed like a need way to Spyder one out. the web site i was and still looking for showed some more pictures, like how the stearing is done, upside down steering stem to the VW linkage.. uhhhh nope, i think if i do it it will be to a rack and pinion set up. as for the merwing it is with it's org wing owner up in Yucca Valley tooling around town.
I don't think the C/G is any higher than my wifes Can-am RT. their was a post awhile back called Stealth trike that used a Quads front end and an St1100 that really looked good too but he changed from an A frame to a beam front and it didn't look as neat just rode better.