Timing Gear Drive

Here's what I have so far on the oiler. Drilled intersecting holes on the back and side of the plate and simple length of 3/16" brake tubing. Its not secured yet. The end going into the plate for the gallery feed I will laser weld in place once I've got everything finalized. I happen to own a laser, its fun! The great thing about it is there is virtually no heat transmitted to the piece, can hold it in your hand while you weld...no heat will get to the bearing, no oxidation. And no tapping. I'll drill a few holes at the bottom of the tube aimed at the gear to spray onto the bearing/teeth and cap it off after shortening. I still need to devise a clamp of sorts for the free end of the tube and blend the intersecting holes. I'm thinking a removable clamp in case I ever have to pull that bearing or change the tube for whatever reason

The bottom side of the plate where you see the black marker needs to be clearanced against the aluminum Moon front cover, its not alot, a MM maybe. Opinions on whether to grind the plate or the cover would be appreciated. On the one hand grinding the plate may increase the possibility of debris getting in the bearing, one the other hand grinding the cover may weaken it and lead to cracking, now or after use. Also need to figure out a seal on the back side of the plate, around the gallery feed. I was wondering about an O ring in a groove or a compression washer of some sort.

I wanted to run all that passed you guys in case I missed something on my first venture into this kind of work.

Thanks in advance