Perhaps I've confused him by saying "custom coilovers" and he thinks that I'm changing the suspension layout e.g. Wishbone to Mac Strut.
I've had a response from another certifier and it looks like I just need to get the welding done by a trade qualified welder which is what I was expecting. Anybody able to recommend a good qualified welder who would do a small job like this at a good price around Southside Brissy?
Mine is custom coilover. Mod plated and passes RWC.