I have before, and they are ok... I do like the work dome by DiffTrans out at Windsor though. Con from Diff Technics learned the trade from Diff Trans when he worked for them, when they were located at Greeenacre.

More recently I have had all my diff work performed by D&R Diff at chipping norton. They did a great job with re-alignment of the diff housing for my track car. [laser allignment method]. The process included straighting of the housing to dead straight, then alligned to my request of 3/4 degrees neg camber and 3mm toe. Pricing was extremely fair.