Originally Posted by
HillRider
Well, nobody said it was a good design, just one you are stuck with unless.....
Does your frame have at least 1/2" of seat tube projecting above the toptube? If so, you could drill a small (~3/16") hole about 1" below the top of the seat tube, cut a slot from the top down to the hole and then add a suitable diameter seatpost collar. That would open up an entire range of seatpost and saddle options.
It barely sticks up 1/4" toward the front, flush at the back, so there's nothing to mount a collar on. Since for me the seatpost is set it and forget it, it should be OK.