I've decided I am in the market for a Tuckaway. After hours of trying to decide which body material, trim, filler system, etc that I want, I am leaning toward the older striated vac models. I would prefer a Touchdown sac filler, but I assume they dont exist in striated as that would defeat the purpose of the transparent barrel. Then I got concerned that the vac barrel could get permanently stained and ruin the transparency. Noodler's Bulletproof Black is pretty much my exclusive ink just because I require as much water resistance as possible. All my other pens are sacced or C/C pens. Can someone confirm if this is or is not a problem before I purchase a striated? If not possible, then I will concentrate on a solid bodied Touchdown Tucky.
Also, is there a very SIMPLE (eg. one sentence description) of all the different Sheaffer trim levels and a hierarchy? Every time I try to read some posts, the discussion gets way heavy with minor nuances and one-year variants, etc, etc. As someone just getting his feet wet with Sheaffer, I would just like a very simple primer. I'm sure there is a good post on FPN, I just haven't found it yet. I know this is probably wrong, but to give an idea:
Crest: has a metal cap
Craftsman: cap and barrel match. Thin wire cap band. Lowest tier