So, I decided to secure the oil pickup tube. Now, if it were me I wouldn't worry. That tube is hard as hell to install and my old one certainly hadn't fallen out. But too many experienced people I respect seem to have tight tubes fall out.
Welding is out for me but I remembered Cliff talking about using a set screw. I found a small (5mm) set screw that I had a tap for. I tried it out first on my old pump. I drilled the 3mm hole and then followed up with a 4mm bit, then the tap. Cut the screw to length. Apart from the stress of getting all the chips out seemed like it should work.
So I started very carefully on my new pump. Took everything out. Drilled and tapped the hole. But in the back of my mind I was wondering how I would keep this set screw from backing out...