Well, here is my stab at the homemade hollow core lube. The mix is 50% beeswax, 40% crisco, and 10% canola oil. (Measurements were guessed at.) Photos show how I 'cast' the tubes of lube. Works OK, still in first stage of developing the system. First thing learned, pour a little in base BEFORE putting the plastic pipe into the wood block and let it set up to seal before filling the pipe with melted lube. Second thing, don't forget to put the washer in place to cneter the 3/8th rod.
Otherwise, photos are explanatory.