The 210 does not have a removable spindle. Unlike other changers, this one was intended to operate in manual mode also with the long spindle installed. Garrard made the dropping mechanism much more intelligent than other brands, so lifting records off is far easier.
The rubber idler wheel may be revivified by carefully removing the hard outer layer of rubber with fine emery paper. Do this with a lathe or electric drill so you do it uniformly, and do not mistakenly rub flat areas onto the idler wheel.
The arm pillar has an in-built lock, the lever at the base, turn it towards the platter & it locks the arm down.
Also the flag on the end of the size-select arm can be rotated to point downwrds, so it is less likely to be broken off in transit.