tbh mate, anyone can make an exhaust, stick to known brands and you know waht your getting, i mean this, lots of garages can make exhausts, its a piece of piss, but to have a decent exhaust some research has to go into it, end of the day modifying isnt cheap but saxos are really comon so theyve been done and done, which mean by now you get good parts for good money as theyre so common, custom exhausts are good, but for if going for custom you need a reason imo(not always the case just my opinion), say a very high spec car that you wish to breath properly, and they normally arent cheap, so unless theyre a very reputable fabricator id stick to a pre made design,,