holidaychicken
Well-Known Member
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Similar,I think mine was more tapered to self centre in the existing hole. Used it a few times never needed to take the heads off
I think I would do as you say with the grease or cutting compound to catch the swarf, if it was used until nearly through and removed and cleaned then finished it may reduce the chance of getting anything in the bore.
Ant has probably had the heads off and back on by now anyway .