I have used Just Tyres for my 90 for years now, checks are free and if it needs adjusting it is about £20. In 11-years mine has only had to be adjusted twice and that was after I had fitted new parts, new TRE's the first time and new steering bars & TRE's the second time. They don't have a problem with larger tyres either, I have 265/75x16's and they aren't an issue.
I did once get my local garage to check/adjust it (after the new steering bars) but I was never quite happy with the result, took it to Just Tyres again and they found it was a fraction out. They adjusted it, I got my money back from the local garage and the steering was back on top form again.