Top of the thread has gone walkabout! First post is Zane asking where he can get a triangular screwdriver to fix his sons Thomas loco. Neils answer is as above and Zane has replied to say he never thought of a allen key.
I tried to paste it in from a list of Zane's posts but the formatting goes to pot.

Managed to paste it as an image.
John
Edited By Journeyman on 14/06/2019 10:04:33