Here I put a manual to construct to us a quite comfortable saddle.
Materials: Plywood wood, to cuter, foams, 4 screws and 4 nuts, polipiel (cuts) and staples.
We cut to the wood following the forms of the original saddle.
http://img283.imageshack.us/img283/8724/pict15jt.jpg
We took the measures on the foam (in mattresses-shops) and with a knife or cuter great we cut the foam.
http://img133.imageshack.us/img133/3291/pict22ld.jpg http://img165.imageshack.us/img165/9166/pict31rq.jpg
Cuts of polipiel of a tapestry and I requested cuts to them, with a little will be worth us to upholster our saddle.
http://img165.imageshack.us/img165/645/pict49oa.jpg
Screws with its nut of palometa, so that it is but easy at the time of disassembling it, with no need of keys.
http://img165.imageshack.us/img165/8013/pict59si.jpg
The holes with the measures of the original saddle are made.
http://img165.imageshack.us/img165/1491/pict62px.jpg http://img367.imageshack.us/img367/3365/pict75vo.jpg
Now we blocked the screws so that they do not give returns us when tightening. With two subject staples affluent it will be worth to us.
http://img6.imageshack.us/img6/6646/pict87vc.jpg http://img42.imageshack.us/img42/451/pict109ho.jpg
We put the foam on the table with the screws inside and upholstered with polipiel, putting staples to polipiel nailed on the wood. This it is the result.
http://img265.imageshack.us/img265/4846/pict143xy.jpg http://img265.imageshack.us/img265/6206/pict150rt.jpg
On colín
http://img120.imageshack.us/img120/8136/pict162uw.jpg
Good I hope that you have liked.
And sorry for my English.
HOW-TO: Upholstering a saddle coway (photos) 
