Staining: How Long Does It Take?

[majolo]

I hadn't read much about inks when I got my TWSBI Ecos so I wasn't very aware of staining issues. I've already been using them for a few months with a couple Sailor Jentle inks mainly (Tokiwa-Matsu and Yama-Dori) and they have cleaned out fine each time I refill. Is it safe to say these inks are unlikely to stain the pens if I've gone through a few refill cycles over a few months?

 

I'm mainly concerned with my first more expensive demonstrator, a Pilot CH92 I ordered, and wondering if I can use the TWSBIs as a sort of "testing ground" for inks before using them in the Pilot.