Don't go too low with the offset or you may struggle a little. I have ET10 on the ID-Workz Glanza and there is plenty of work to be done to have the rear arches perfect yet. I have fitted wider front wings so the front wheels sit perfectly without any further modification to the arch.
I don't think it's fair for you to throw abuse at Jamesbaa (the seller) without even knowing what's wrong with the ECU! It's not the first time you've spat your dummy out straight away either!
Thanks for the kind words guys! I'll be doing the rear arches myself Josh. Si - I removed the ABS pump, the brake pipes and the distributor then fitted all non-ABS parts.
I changed the master cylinder to a non-ABS one when I removed the ABS, but that was buggered. Not sure if it was different to the ABS one though, so yeah I've fitted another non-ABS one.