Regarding oil changes on the X-lite motors. Buy a SIX point box end wrench to loosen the oil barb/drain plug. I rounded off the hexes on one of my bikes fittings using a 12 point wrench and spent hours with vise grips and chisels removing the fitting. I did replace the barb fitting with a plug from a TC but continue to use that six point combo wrench to keep the plug in good shape.
The manual states for you to just loosen the hose clamp on that vent hose loosen the barb fitting without removing the hose. That would require an open end wrench! Don't ever do it that way!
If I can't fix it...I can fix it so no one can fix it!