I tend to agree with Hopper and would mention that both manuals are available on the internet and again, both manuals i.e. for the ML7 and the Super7 show a tapered wooden wedge being used against the respective bull wheels. The manual is there- why not use it?
Again, whilst the lathe is in bits, it is time to go through what was bought with a fine tooth comb and see what the condition of of the feed screws and there respective nuts. For my part in all of this, I cannot honestly imagine the 'Chinese metal' nuts not being worn- if not that the whole assemblies needing replacement.
Again, the oil cups need replacing and from my long experience of such things, should be replaced with NEW and unworn parts.
I'm sorry but I have received a succession of very worrying occurrences of death and worse in the past 24 hours.
One of my very close friends wrapped my knuckles about 'penny pinching' and that much forgotten Northumbrian tune which includes the words about 'skinning a rat for its hide and fat'
Well, with luck today I should have an almost new Myford Super7 with gear box and power cross feed.
My opinions whilst others may differ