General Technical Questions and Answers last answered over 1 year ago.
You may also want to visit the Wiki(pedia) for a more structured index of T25 repair, maintenance, technical and ownership topics
they're £56 +Vat - club discount (61 quid ish) at gsf including the servo unit which seems pretty good price. It cost my lad over 80, for just the cylinder on his ax about 2 years back.