Re: Welcome To The Welding & Metalworking Forum
Have you considered making a seat pan frame from something like 3/8" steel round stock then using wood/plywood for the pan. Of course I'm assuming you plan to add foam or something to absorb the road bumps and unholstery. I've made a couple of chopper/bobber seats using this method and they seem to work fine.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"