There are no limits dude.
I have 7 high school kids benching 300+ right now and they use bands every week. one of the 16 year olds is benching 295 and dead lifting 475 at 185 pounds, 8 months ago he was pressing 215 and pulling 385. i attribute ALL of the gains to adding bands and a DE day in the last year. Louies recommendation to beginners is adding a DE day in almost every situation.
Enjoy training for what it is, with the gains you have made, it's hard to argue you are doing anything wrong IMO.

Thanks dude, I'm just enjoying lifting again after feeling pretty stale for several years with no significant progress.
Friday, 11/21
Lower Body ME#1 Pin Rack Deadlift (2 minute rest)
135x3
185x3
225x3
275x1
315x1
315xMissed
45-degree Back Extension (60 second rest)
4x65x6
75x3
Lateral Roll Squat (60 second rest)
BWx10/side
10x10/side
20x6/side
Cable Pullthrough (60 second rest)
3x175x10
Cable Side Bend toward stack (no rest)
45x20
50x15
My grip sucks donkey balls so my deadlift blows. Strapped I've pulled 405, but with just chalk I could just get a single with 315 before my grip was gone. I'll be trying to work my grip a little more often - static holds, farmer's walks, hex dumbbell holds, etc.
I'm willing to give the lateral roll squats a few more workouts before I decide on them, they do seem to hit my glutes and vastus lateralus pretty significantly, but they're awkward as shit for me right now. I blew the shit out of those pullthroughs today, though. Had to pin a 25lb plate to the stack because I've had it maxed out for a couple weeks now. I know it's a double-pulley so what I'm using isn't 100% accurate, but still. I can only get about 20 more pounds heavier before I run out of ways to make it heavier.