Quick update but the hammering trick sort of worked - I noticed there was more clearance between the drive gear and slider after I tapped it. Ultimately, I grabbed a screwdriver bit that was long enough and inserted it into the shaft from the other side and pounded the bit against the floor so it would push the drive gear outward and that's what did it.
Now, I'm not sure but I possibly may have damaged/flattened some of the teeth on the drive gear.
EDIT: just reassembled the reel and definitely the teeth were damaged - you can feel the rough spots while turning the handle. Ughhh... I might just send this back into Quantum to warranty. The drive gear I think is the problem. Possibly the pinion too. They'll prob have to end up doing an overhaul on the thing at this point. smh
BTW: there is no other way to remove the screw attaching the slider and main shaft from my observations. You have to align the proper hole over the screw and very carefully remove the screw while holding the spool down very securely (perhaps tape would help) so as to prevent it from rotating. Otherwise you will do more damage. It's a very tight tolerance and seems like a poor design choice. Oh, the other thing I messed up was a retaining o-ring that sits between the rotor and the washer and bearing that's above the AR clutch. I'm assuming this seal is there to help repel water if it gets into the main shaft. The o-ring is super thin and tiny, so when I pushed the rotor on it basically tore it. The o-ring must have been sitting too high and I needed to lower it. I thought there was an etched channel for it to sit but I couldn't locate it while reinstalling it.
Either way, I may have to send this in for repair unless Quantum can send out the parts. Of course, I think I'd feel more comfortable having them just service and fix it under warranty to ensure that I don't make any other idiot mistakes
