Aftermarket seats - Measurements of the Clio please

[Ed_S]

Piss poor title, I'm aware

Cant get out to the car to measure what I need to know so hopefully with this paint diagram someone can give me some help.

Key:
Purple is the seat, blue is the subframe, which is where I need measurements.

Scenario:
I've got some other seats to fit and am seeing other ideas than the OMP side mounts with OMP Clio specific sub frames, as £160 for some steel is pretty damn pricey.

I know from a quick look the other day that in the clio the rails are not level, hence my measurement 2 and 3, am thinking of box section on the lower side to bring it level then side mounts on top of this box section frame.

 

[Ed_S]

Oh and if possible the distance, front to back between to bolt holes (to the car) on the runners

 

[Ed_S]

For future reference, the difference in the height of the runners is around 34mm, will get precise measurement when me and a mate are making some subframes in the next few weeks.