man feel your pain haha, I did something similar but it was with the HFC's, I thought my cats were packaged with my exhaust and started installing everything, removed everything and got stuck on the demon bolt and double checked my parts again and I hadn't even received my HFC's yet haha, so had to tighten up the stockers again etc..
needless to say, had organised with a friend to lend his tools etc to do the install and the HFC's arrived the next day
anyway have the HFC's on now but took quite a few weeks to arrange to borrow his tools again lol.