Break-in oil & Ross pistons

[Fourdy]

I have been advised that I should use a break-in oil such as Gibs break-in oil for my rebuilt blower 276 flatty. I can’t seem to find whether or not it is indeed the best to use for break-in or any different than using VR-1 for both initial and after break-in.

I could also use some advice for the Ross piston with metric rings. Any special tricks to get them installed properly? I have read and studied the instruction sheets.

Any advice would be appreciated. Thanks

Fourdy