This afternoon I started cutting the rollbar side rails to prep them for the extensions I’ll be welding on them.
As I cut each side rail, I also cut a groove between each side of the seat back shelf edge & the adjoining longeron. It took a few iterations to get the side rail to slide in, but the fit on each side is still fairly tight.
Here’s a view from the front showing each side rail cut & in place.
I then cut & added the wood cross bar mock-up with the rollbar installed.