#1 Main Bearing oil hole offset, open up ?

bOb shingler said

#1 doesn't get a lot of stress like the others but I always open it to 5/16", it only feeds the first rod bearing and timing chain.

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5/16" ? what do you do the others too ? bOb shingler ? did my block passages to 1/4" and 9/32" like what was recommended. actually they cleaned up by hand twisting the reamers. didn't see a recommendation for doing #1. Do you open up the Bearing holes ? thanks, C300