Something I have been looking at for a while is modelling of a race seat, but so far have not come up with an accurate and robust way of approaching this (am quite new to SW).

The seat in question is a Tillet T9.5XL

I initially attemped to use the 'blueprints' method, sketching multiple profiles, then using them to control a surface.. I created a 3D sketch for the rim, created a Surface Fill then used the freeform function to pull the surface (quite innacurately) into shape. Kind of.

I would be interested to know whether anyone would have a different method than this to create the seat moulding with the edge rim, and have it adaptive, symmetrical, accurate and parametrically driven. I have the seat in question at my disposal, so measuring to create a series of sketches through the part is also an option.

Thanks in advance.