Sorry for misunderstanding regarding feed and reservoir.
Schmidt converters lik K5 and K6 (I usually prefer K6 with threads) are great for pen users who change their inks often.
I measured myself volume of the ink K6 converters take and I find a number around 1.2-1.3ml. I pump twice for filling the feeder air channels, and let the ink drop once to have enough space for inking to breath. This is what I have
Thanks for sharing your blog posts
here to help