Perhaps Fred, it is time you considered joining the forum as a supporter and then you can ask away as much as you need. As in the news paper shop, its ok to read the front page but if you want to do the cross-word you'll need to buy the paper.
In 99.9% of Tamiya tanks, the sprocket wheels are held on with soft plastic rings; "poly-caps" they just push on the shaft and do not need glue.
In 99.9% of Tamiya tanks, the sprocket wheels are held on with soft plastic rings; "poly-caps" they just push on the shaft and do not need glue.