Seat strength members / extra support

[DaddyA]

Hi all,

It was posted a while back but cannot find it - possibly deleted??

Has anyone got the dimensions for the extra seat supports (hopefully some nice ones from Fabby) as I will be using ali for the floor and need the extra support for safety and of course the eventaul IVA.

The ones between the sides and tunnel.

What are people using - 40x3, 19x19, 25x25???