i used to always vacuum bleed. But i've found i get a 100% better bleed every time using this bottle and creating a seal on the bleed nipple: https://www.amazon.com/Genesis-Perso.../dp/B000W7F2GI
All you have to do is open the bleeder and pump to your hearts content. Less work than dealing with my vac bleeder as well.
haha funny you mention that, i ordered something similar as well... its just a 1-way check valve, thats whats in the cap of that bottle one
gonna try both... i want firm brakes again damnit!