Seatframe Fabrication

[Rob]

I need to fabricate a sturdy seatframe to mount the slider for my
race seat.

Any engineers here who can help me with some tips ?
I was thinking about making a 'box' out of square tubing, and mount it to the
reinforced space where the original seatmounts are.

For strength I'd mount a bar diagonal across the 'box'.

Hope this is somewhat clear

Any hints/tips are appreciated.

Rob.