I should think that the required accuracy of quartering will depend on the throw of the crank and the slop in the axle-boxes and coupling rods.

If you make them all the same maybe you'd be all-right but it's possibly going to mess with your valve timing if it is an outside cylinder engine. Possibly it's going to make the beats sound uneven.

I would have though the point of using a quartering jig is that they all come out the same. If the first one is wrong because of the jig, then if all the others are the same, then not too bad.

If you didn't have a jig (or a proper scheme) and that's why it went wrong, don't make a jig to ensure the rest are wrong the same, because they'll be wrong and different. Make the jig to make them right and correct the first one properly.

If you don't have a jig and don't plan on one, then they'll all be wrong anyway, so just carry on!

If/when you want to fix them, just warm them up and the glue will let go. The data sheet says maximum working temperature for the glue is 150C so it ought to be releasable with a gas oven, or if not, a blow torch.

In the end the glue is just plastic. Unlike metal it melts at quite low temperatures.

Edited By Andy Ash on 18/02/2017 21:17:52

Hi Chris

Just make sure the other 2 are 2deg the same and it wont make any difference to the running, an engineer designed a engine with the throws 180deg if the driver stopped with his side on wheel top centre it would start if not passengers were asked to get out and push but once running it was a very smooth ride

Stan