I recall there being a specific Model 30/2 service bulletin for filling the suspension towers that you may request. Viscosity (CST) & amount (ML) of damping fluid are provided. Prefilled syringes are available from SME as well. The Model 30 variants do not use a dashpot as their fluid is in the base of each suspension tower.
Regarding the motor controllers, with the exception of the new AC Motor Model 6, all of the controllers are interchangeable. The original rotary style controllers feature a linear power supply whereas a Switched Mode Supply is what is now being supplied.
I understand the factory is operating in COVID mode with limited staff. I believe contacting them through their website is best:
Hope this helps.