I use the valve at the drain tank and it works fairly well. You could simply get a three way brass fitting and put two 1/2 inch nipples for the two hose connectors and have a screw out plug in the low point of the oil feed hose. It would mean being able to get the front end up high enough to easily get under the screw out the plug. In essence that is what Emil's kit has done

Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys