I think you’re OK.
The spindle bearing of your 20/2 is sealed and should not require any service. When it was originally sold, SME included an extra “charge” of p/n: 1058/20 Syringe of Spindle Oil. It’s my understanding in discussions with Brian Laker @ SME that the bearing will last a lifetime even if that additional supplied syringe charge was never injected into the spindle via its chrome oil fill adapter fitting (p/n 1129).
Keep Calm & Play Records 😉