MPN11,
I stand in awe of, and humbly defer to, your courage and technical expertise ! As for even daring to look inside the HT Cabinet, perish the thought !...... Screwdriver ?....... (I feel quite faint).
I've always believed in the Division of Labour. A bit of half rememberd doggerel (G.K. Chesterton ?):
"Peter Charles Augustus White
Tried to mend the Electric Light.
It struck him dead, and Serve Him Right."
"It is the duty of the Wealthy Man
To give Employment to the Artisan"
(Forget the Wealthy bit)......Cheers, Danny