A bit more progress on the Polly so it is best I add to the "features" list of the Polly model/drawings:
The two brass castings for the Arms do not match the drawings
This does not actually matter and there is little point trying to change them. And as the Displacer Link is already too wide in the gap of the arm there is no point in thinning down the end of the displacer rod.
The power piston drawing does not show the piston being threaded for the Gudgeon Block (or a nut to attach either)
Both Laser cut arms are ok but the location of the centre pops for the holes for bushes needs pushing over to be more central.
Both mounting plates at the bottom of the crank bearing and the cylinder castings are undersized in one direction but they are dimensions that do not matter.
I am not sure if I really need all of the fixing screws that came with the kit
As I normally make my own fastenings I am tempted to make my own again as the ones provided would need cutting down anyway. I am still wondering if I really need to drill holes in the top of the platform to attach the lower piece or if JB Welding it together would be sufficient. I am tempted to give it a go and if nothing else if it fails it will give Jason another reason to
my build
Jo
P.S. As you can see someone had to check one of his casting sets was still all present and correct
I am hoping to be allowed to fondle them later