It does look pretty twisted but two pieces of thick ply placed either side in a bench vice should do the trick - Slowly wind the vice to avoid it causing further damage. with this method you can make adjustments by angling/rotating the frame so you can ease it into shape accordingly
It does look pretty twisted but two pieces of thick ply placed either side in a bench vice should do the trick - Slowly wind the vice to avoid it causing further damage. with this method you can make adjustments by angling/rotating the frame so you can ease it into shape accordingly