Welcome to the BurgmanUSA forums Bump. Glad to have you join us.
There are 2 small recessed screws that are only visable when the buttstop is all they way back. Remove the 2 small screws and then move the buttstop forward and it'll come completely out the front of the seat.
The set screws holding it can be a booger to remove. I managed to remove mine with a small pair of vise grips after I rounded out the head. You'll be left with two holes and quite a bit more space to stretch out with.
The holes that are left have huge plastic or rubber grommets around them. A bit ugly, but there is no danger of the seat fabric around the holes being damaged. I bought 7/8" black plastic hole plugs at the hardware store to plug them with temporarily. The seat surface where those holes are is quite hard, which bothered some folks, but really did not bother me. If the seat feels right as far as leg room with the backrest removed, you can have it recovered, and a pit of padding but over that hard plate. A local auto upholsterer did a nice job on mine for $200, which is less than half the cost of the Corbin seat.
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