So regarding ram registering hits. The pro appears to be different than the LE as it has spacers, so up and down movement isn't an issue.
That said, here's what I did to help with hits.
1. I adjusted the switch to make it a bit more sensitive. This helped a lot and step 2 is only optional if you want that extra little bit of consistency.
2. Under the playfield where the ram sits is a plastic piece for the Rams travel. I cut a piece of drop dead ball foam and stuck it inside where the ram is at the resting position. This positions the ram only a fraction of a butthair closer to the target. See pics
Pic 1: original resting position of ram.
Pic 2: new resting position of ram. You can see it's barely even changed. But seems just enough to give it enough 'umph' from left flipper hits.
Pic 3: under playfield with playfield in upright position resting on backboard. This is the ram up/down plastic piece. The little black foam in the pic is Drop dead ball foam that I cut to fit the space.
I'm not saying this the end all be fix. But it's improved hits by 90%! It's night and day now that I can actually incororate pf multipliers into gameplay. Definitely a risk/reward hit whereas it's easy to lose a ball from it but got a 4X going during HOTK that ended in a 1.7 bil HOTK multiball.