If you were to make up a plate to join a seat frame to runners, where the runners are wider and longer than the seat frame, what thickness metal would you be using ?

I am thinking along the lines of a plate to attach onto runners, with holes in the right place for the seat frame to bolt onto, maybe double thickness where the holes are for stiffness, etc...

Thanks
Greg

 

BTT with additional question, what metal material should I use ? Mild steel, aluminium plate

 

i used stainless steel 10 gauge (just bigger than 3mm thick) to adapt rs2000 recaros into the other halfs fiesta ZS n its been fine.

 

Thanks