Im in the process of refurbishing a Uni3 that has a lot of options that are not existent on the Uni1 thats been my workhorse for over a decade. The one that has me the most perplexed right now is the ink fountain system. Does anyone have any literature on how to properly use the ink fountain or even better would be a video of one in use. Im not sure if Im missing parts or what but I don’t see where I can put ink in there without it falling straight through. Any help would be greatly appreciated, thanks!