Thanks John
I should probably have asked "does anyone know what the exact original grease that Takahashi uses is?". I'm pretty sure that the lapped centre baffle is critical in terms of the viscosity. The whole mirror assembly slides super-smoothly up and down this tube, and I'd prefer to use what Tak themselves use. The helical focuser doesn't matter so much. Do you know what this Superlube is based on?
Hans - would you mind?
EDIT - where'd you go Hans?