Fitting a double swivel is a must for my setup but not so enjoyable is paying for the solutions already out there. So after much research I decided that I was going to fabricate my own swivel having mocked up a rough design of how it would work I needed to source the parts, this was harder than I imagined with not knowing exactly what I was looking for.
While looking for a particular dimension star knob, I came across something called a clamping handle, which is basically a M10 nut with a ratchet on top seeing as they were not much money an idea sprung into my head and I ordered 4.
So step one was to undo the double seat and put the bolts I had removed back onto the threads to shorten them.
Step two put the seat back into the driving position and check the clamping handles worked and were tight enough
Step three I now have a front double seat that can swivel it takes me no more than 2 minutes to undo the clamping handles turn the seat around then secure it by putting 2 back on.