I dunno, where do you need more room, for your legs.
I reckon you could move the seat back further. Unbolt it, and move it back a bit, depends also on which one you buy, in mine for example you would need to cut the back of the tub out and put in one of those tub crossmember things, then you would have space to move the seat into.
Its not impossible, of some of the things people ask of LR's its not that big a deal.