Bob I’ll check the ones I have from Macs that I bought years ago. It seems the original was a 20-20 ammeter and not the 30-30 ones the offer now. I suspect you will be fine with it firing without having to enlarge the hole.
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Jordan Baker
RHLI Museum,
Otter LRC
C15A-Wire3, 1944
Willys MB, 1942
10cwt Canadian trailer
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