Most of the time we have been trying to reduce park by going to a larger hole like #55 and #54.
The hole size may be the same as Losi but of course the relationship between the piston in the bore is likely to be different.
That said, Grant Williams and myself tend to run a Schumacher three-hole pistons drilled out to #55/40wt in the front and #54/35wt in the rear with great results....
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