holiday76, I know you kept your Carlton Flyer 700c, but I thought this would be apropos the discussion of tall bikes and 650B conversion: this is my 25" Shogun frame converted to 650B. I do think that really large frames look funny when converted, but not if large fenders are used and the tire-fender clearance is kept fairly large:



As for using 27"/700c fenders with 650B wheels, if they're aluminum, I suppose the arc can be reshaped smaller by creative manipulation, but on my latest 650B conversion (new Soma mixte frame designed for 700c), I decided to stick with true 650B fenders rather than try to reshape an existing 700c set.