They're not actually Tek screws, they're what we refer to as cladding screws.
But the sheeties still use tek guns to screw them in with using a phillips bit.

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Too many cars, and too little time.

Wedging is not done to reduce oil drag, but to improve the balance factor.
1275 motors in particular have bugger-all counterweighting. Wedging makes the crankpin side of the webs lighter, has similar effect to increasing counterweight size. Less main bearing wear.

Blading is done to reduce oil drag. Unfortunately, it undoes much of the benefits of wedging, most of the metal removed comes off the counterweights.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

brief update.... took it to my machine shop and they reckon that can't be bored out, so I spoke to GR and he suggested I bring it up to Sydney and he can sleeve the block and do the rest of it for me

need to organise a work trip to Sydney

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did I tell you that I won a trophy?

Yep, I'd go along with a small piece of the diff cogs throwing into the gearbox and jamming it, it has happened to me in a Minor when I broke 5 teeth off a cluster.
"Chip off the old block", as it were.

read it again.... the diff cage picked up a tooth and smashed it into the diff housing which jammed the shaft behind the diff

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did I tell you that I won a trophy?

minor update.... diff etc. is on it's way from UK, my spare block has been bored, and my cam is at GR's getting a refresh....

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did I tell you that I won a trophy?