seems you checked pretty much everything already - not a big surprise, I know you know what you are doing 
3.0mm TP is a bit small for a full fat 80... I'd defo open it out to at least 3.2mm initially, as that should significantly improve things. Ultimately I'd be expecting 3.4-3.5mm to be the sweet spot.
PS ream, don't drill. a 1/8" reamer will be perfect for a start
Last edited by Shed tuner; 24-03-2024 at 09:23 AM.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.
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