If you don't know about Large Fella on a Bike he's someone who was in your client's present shoes. You may want to pass along the link to him.
Large Fella on a Bike
I'm sure you've got a good plan on how to construct his frame nor do I want to step on anyone's toes but IIRC from a long ago Riv Reader Bob Brown built the bike and probably has some good ideas on how to proceed.
Bookmarks