Quoted from EaglePin:1) For the manual plunge a different spring could be the answer for you but before making the change it's worth it to take slow motion video of a plunge first to make sure the ball is going straight down the shooter lane ramp and entering the orbit without rattling against the side ball guide rails. If the ball is entering the orbit cleanly then the spring will likely be the answer, but if it's not entering the orbit cleanly you may need to slightly adjust the shooter lane ramp and/or the positioning of the plunger tip. If you do need a spring, here's a post that has the color information in order from lowest tension to strongest along with part numbers:
https://pinside.com/pinball/forum/topic/jurassic-park-stern-2019-owners-club-welcome-to-jurassic-park/page/270#post-6829098
2) I wouldn't replace coil stops until you have a problem with the current ones. No need to replace a part that isn't broken. If one of the current ones gives out you'll notice weakness in a flipper and/or that a flipper has some give to it when the ball hits it. You'll know a coil stop is bad if the rivet at the bottom of it is loose or has gone missing. Replacement is really easy and only takes about 5 minutes. Just two screws to undo in order to take the old one off.
For the coil sleeves, I like to replace those every 400-500 games or so. The inside of the sleeves get very dirty and over time that can cause a slight reduction in flipper power due to the additional friction for the coil plunger inside the dirty sleeve. To replace them you just need to take the coil stop off, slide the old sleeve out, and put the new sleeve in.
3) For the wireform, there's no need to fix anything if the ball is travelling across your wire without falling off. If the ball is sometimes falling off the wire then you'll want to make that slight bend at the very end of the guide to fix it. Otherwise no need to do it.
4) You should be all set with the digital level. The PinGuy app on iPhones works well also. It's best to measure side to side level both near the flippers and also further up the playfield to make sure both the bottom and top of the playfield are level side to side.
Really appreciate the response and details provided (including the other post regarding first time pinball tools). I have a lot of random tools from other projects but will be taking a solid look at this to ensure I'm not beating my head against the wall later on down the line here.
The ball is definitely not getting struck clean with the plunger after further evaluation so I'll have to make some adjustments on that. The rest of it I think I will just have to monitor as I play a little more. Working on the final leveling this evening with the app (digital level will be here in a couple of days).
I'm sure I'll have more questions later but this is all enough to get me started for the maintenance piece.
Thanks again!
-AJB