Ring-a-ding crankshaft

[Ruairidh Dunford]

To add further to Alan’s comment, between a third and half of all the rods I test are cracked, a small number are bent vertically and some have a small amount of twist (both of which can be corrected with surprisingly little force).

I have found that end to end balancing a set of four can be quite tricky to achieve without a large selection, and further work, hence my photo above.