they are really not hard to do, ive done several. as mentioned above measure twice, cut once. look up into the front storage compartment to try and guage how far forward it goes(may end up cutting into the forward wall of it) and remove the bow panel and look/feel around under there to make sure there are no obstructions. ive done them on 2-3 stratos in the past, usually 3/4-1" thick deck with sprayed foam on the underside.
something to think about, if you have or will get an ultrex in the future, make sure the pan is wide enough as that is the widest foot pedal ive seen yet.