Got the secondary oiler as part of the overall Economill package. Video instructions are very clear but I found I need an 8.2mm drill to give clearance for the thread on the oiler bolt. I also opened up the drip hole on the oiler bolt per the recommendation. Tad nervous about drilling into an expensive bar have to admit! Per the video and other comments, the bar metal is tough to drill so new or freshly sharpened bits are defo required.
I'm hoping the hole location, top or bottom of the bar, doesn't matter for when I flip the bar after chain sharpening as I don't fancy having to drill a 2nd hole!
In the video the oil pipe appears to be simply 'popped' onto the oiler bolt but I'm having to use the hose clip else oil leaks.
I have a 36" bar so not sure if actually needed but I'm erring on the side of over lubrication rather than running the chain and bar dry.
Don't forget to turn the tap ON at start up and OFF when not using! There is a residual amount of oil in the pipe (after turning the tap off) and this continues to run so beware.
I'm finding the tap connection itself it a bit leaky ? so don't leave oil in the reservoir when you pack up, empty any remaining oil out. Lesson learned.