Don't have any tack cloths I must admit so I'll get that taken care of!
Sorry to be dense but ratio wise to you mean 2:1 sealer:water or the other way round?
I don't mind the idea of turning between centres actually, as I normally use calipers to measure the thickness of the wood with increasing frequency as I get closer to it being the right size, so I don't mind not using bushings as a thickness guide as such. Isn't there a risk turning on centres that you flare out the brass tube end though? Ie to get enough purchase on the blank/tube for roughing etc can you compress up the tailstock enough without risking that happening?
With anything specific or just pens in general? I'm on the Isle of Man. I've a colleague at work that's very helpful with advice, but it's not too practical to go and visit his workshop (assuming he was happy enough to share his time like that) due to child arrangements, and where he lives etc etc. He's very good at his stuff though!!