Grease in B4 Gearbox?
 

Does anyone put any grease in the gearbox of the B4 as the manual dont say anything about it.

No need; I believe the material is self-lubricating.

self lubing????

A property of the plastic; it's kind of waxy so they don't require anything adding. I think it's the same on the B44.

I use a small amount of grease, makes for a much nicer sound. I won't hurt in any way.

Nothing too thick. A couple of drops of 25wt shock oil does the job nicely.