SM Head Modifications on a budget

Earlie A said
I bought Drill Hog brand drill bits to drill the holes for the 9/16 and 17/32 brass tubing that you recommended in your old thread. One of the two sizes was difficult to get in the hole and I would be concerned about scraping all the epoxy out of the joint when inserting the tube. Is there a way to peen or solder the ends to make sure they cannot come out. In the case of the oiling head bolt tube - if the brass even rotated in the bore it would be disaster. Or does drilling for the oil hole automatically create enough damage to the brass to lock it in place?

I bought ball hones from Amazon to hone the bolts holes and pushrod holes. This allows more epoxy to stay on the tube. I’ll take a picture of the ones I bought later (house cleaning day). My head bolt tubes are the same length as the head hole so that tube can’t go anywhere as it’s trapped by the head bolt. I chamfer the bolt holes on the deck surface.