I also do a lot of wheel building, I build wheels with flanged rims daily, nothing else only flanged rims. the best flanged rims are Takasago followed by D.I.D, after that its much for muchness, I spoke to CWC regarding big spoke angles for extra large hubs and big offsets, I was quite astonished at how they do their rims, their rim suppliers do not supply them with rims to suit odd or rare applications like TZ260mm brake etc, they do them for order only, its taken me 2 years to get a rim manufacturer to make rims specifically for Commando front disc and also the big TZ brake with a big vertical spoke angle, I know of no other rim supplier who has these rims on the shelf , even Buchanans .