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Vitesse Con 2L. The thread in one of the holes(?) on the bell housing to retain the clutch slave cylinder has been stripped (not quilty) I have a Clarke RAD-2 right angle attachment and a 210mm long drill bit and, combined, their total length means that I might have to remove the shift mechanism to get the drill in to bore out the hole to fit a helicoil. Which is a bit of a pain. The drill diameter is 21/64, is it possible to get a shorter drill bit, say half the length. This would allow the combined pieces to fit in the space, between the housing and the shift mechanism, to allow a straight drill into the bell housing hole. As an extreme measure I could cut a bit of the current drill bit but the owner would not be to chuffed about that. Any advice would be appreciated.

Thanks you everyone for some interesting comments and advice. The brake and clutch systems have had DOT4 all their life and I will probably stick with that. As i stated at the beginning the car has been of the road for some time and the various cylinders looked very grotty so all are getting a good clean and the replacement of all rubbers, apart from the clutch slave on which I was unable to turn/remove the bleed nipple and eventually tore the exposed part of, a well known problem with different metals being in contact for long periods and not being exercised, so a new slave cylinder has been acquired (from the well known big R) Again thanks, greatly appreciated. Iain (real name)

Vitesse Mk11 2L convertable I am sure that this has been discussed before but here goes, need some help. Am refurbishing/overhauling the clutch and brake cylinders as the car has been off the road for about three years and the fluid has not been changed for even longer than that. Which DOT fluid is considered to be the most appropriate?