How much herb can be loaded at a time and how many hits can I get off?
My tip can accommodate the following amount of flowers stored with a 62% rh bodeva pack. This is according to my scale so it could vary +- depending on other more accurate scales and the amount of moisture in your bud.
Screen in bottom groove - .07 grams
Screen in middle groove - .05 grams
Screen in top groove - .03 grams
These are the absolute max amounts that I can stuff into the chamber. In practice, I never fill the Vapcap to capacity. I like to pop an unground nug in there and let it float freely. My average load is .015 grams, just a tiny nug. I vape several times per day.
Each time I vape flowers I go through three heating cycles. Each cycle gives me about three mouth-pulled tokes. So I get about 9 tokes each time. It takes about a minute to load, heat and finish a load.
The Vapcap also handles hash with ease and if your into concentrates, you can fit the herb chamber with a concentrate pad and load your shatter, rosin etc for an all day sucker.
Is a regular space case grinder good enough for a vapcap? Do I need the finisher grinder from Magic Flight?
I don't know. I've had my Vapcaps for almost 2 years and I never grind my bud. I don't own a grinder. It's not necessary with the Vapcap. I just tear a nug from a bud and pop it in there. Easy peasy. No fussing required.
Lots of people do like to grind their bud. The Vapcap accommodates many styles.