I measured some of the reproduction flanges and they where 1/4" in diameter smallerthe sprockets where the samethey may have made a new run of tracks that does not require the new flanges
I have a limited knowledge as to casting of the drive flanges but I do know that castings in general can vary in the shrinkage during the cooling process. I would be willing to bet that during the original production there could have been quite a bit of variance.
NEW Flanges are 21-1/8" diameter(originals are 21-3/8")
I'm just glad we have new tracks to keep this hobby going, thank you to those who worked diligently to get these tracks to market so we are all not sitting around with expensive yard art.Thank you for even taking on this as being a U.S distributor..