I headed down to the fab shop today and decided to start on some seat brackets. Grabbed some 1" square tube and made some 17 and 19 inch sections to make a square base.
And since all the good gear is at the shop, I used my favorite welder.. A 40 year old Union Carbide. I don't know why but I weld better with this that anything else.
Ant they fit right into place on the floor
And presto, they are mounted and solid to the floor (used some 5/16 bolts and fender washers with nylocks to spread the load).
I need to get some better pics, but I only had my phone at the time.