Hi and welcome
The Mission 774
1: Trough is empty and has only what looks like the thin paddle. What oil for this combo (30?)and do I need a different paddle or no paddle? How do you change the paddle?
You need silicone diff oil for RC cars (that's the easiest place to get it from,really heavy gloopy stuff) but don't worry about it at the moment - just make sure it works OK
You can see the fixing grub screw buried in the hole to the left of the paddle in this pic
Bias weights - have read the Mission instructions but am confused by the measurements for the one or two weights. Any simple explanation? When arm is at rest, the weights just rest on the deck surface - is this correct?
For instance if you have 2g downforce set if you have one bias weight it should be 43mm from pivot if two weights they should be 22mm from pivot.
Take the left pair of columns for 1 weight
and the right pair of columns for 2 weights
sorry don't know the cartridge
and yes the bias stub does usually just rest on the TT top surface when the arm is at rest,but be sure the 'fishing line' goes around both guide vees properly.
Excellent TT and arm you have there.