as said, ally will clog a cuting wheel.

best off drilling a hole and carfully cutting it out with a jigsaw then filing the edges.

unless you can get it pressed??

as for it creasing, it shouldnt do but it you do bend it, it will be farily hard to remove the dents/creases as when ally bends it stretches.

i got a fairly big square of ally you have a practice on if you want it mate??

can bring it on friday.