Hi Bob
I have a 3/4"+1/8" fusible plug tap you can borrow.
The tap is extra long and covers from 3/4"-7/8".
I used it when I put a 1/16" oversize plug in my Marshall, I assume this is also for your Marshall?
If you pm me your address or phone me on 07970276920 I can post it to you or could get it to my works branch in Castle Donington.
This would go part of the way to thank you for the Meccano set you gave me around 1975.
Regards
Vince.
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