Recommendations for a gearbox flush?

[The_Laird]

I've decided that the S8 needs a gearbox flush (on A4 Audi's recommendation) as a diagnostic scan revealed an intermittent sticking valve. They reckon its recent lack of use might have lead to this. They recommended Mackie's in Glasgow, but I wondered if any of the Alba inhabitants had other recommendations.

I want a top notch job though - I reckon if you're going to have it done, it should be done well.

Anyone here had this done in the Glasgow area?