I'd be grateful if you could give me a little advice; I'm having difficulty finding a suitable seatpost for Raleigh which has a 753 frame and was built by the Special Products Division . When I bought the frame, I was told that it took a 27.2 seatpost. I've tried a 27.2 seatpost, but I feel that I'd really have to force it in for it to fit. I'm reluctant to do so for fear of damaging the frame. The top of the seat tube is slightly 'ovalised' - no doubt due to previous tightening of the seatpost bolt over the years. (I haven't tried to force the bolt flanges apart for fear of damaging the frame). I've taken the frame to a bike shop and they've found that a 27.0 goes in okay, but it might not be correct, due to the 'ovalised' effect at the top of the seatpost. ie. A 27.0 post might be okay at the top of the seat tube, but could be too slack further down. Should I fit a 27.0 seatpost or try a little more force with the 27.2 seatpost ? I'm told that 753 tubing is quite fragile stuff and I'm worried about damaging it. Can anyone give me any advice please ? Thank you !!!