My year old Avengers LE was bending the sling leaf switches. New 2 1/2" rubbers from PBL solved that!
I still get the 555 bulbs popping out of the sling sockets, going to hot glue them with a small dab of glue.
I adjusted the auto shooter and plunger to align properly. Took lots of messing around. This adjustment along with stabilizing the ramp using Tracelifter's instructions fixed the shooter lane, I get 95% going all the way to the top until I replaced the shooter tip. Now if I manually plunge too hard, the ball goes airborn and hits the Hawkeye ramp!
Moved Loki Lock plastic one screw FORWARD (towards the player) to open up the Fury target. Moving it back like many have done just made him a target for launched balls. In the forward position with a 3/8" spacer under the metal tab and him bent backwards to clear the glass. Now I can see Fury target glowing and he never gets hit by the ball launching.
Replaced the double LEDs in the Loki plastic with single SMD green LEDs. The single point of light for each looks better to me.
Added LED flashers to all locations, including back board. The CA flasher between the pops looks really great in pure white! The Red Flex head flasher behind the Fury target looks much better than the washed out colored 906 bulb. The flash of the LED flashers can be blinding until you get used to it. I had to put flasher power to low but it is still pretty intense.
Adjusted the Hulk switch really low and with a hair trigger. Used to get stuck balls 2-3 times per game. Now I get them once every 3-4 games. They are fixed easily with a ball search.
Had to drop the Hulk magnet 1/4 turn to make it flush.
Adjusted the BW spinner switch to be a hair trigger and lubed the spinner shaft in it's mount.
Adjusted the first BW ramp plastic to be 3 washers higher (this REALLY makes a big difference on the smoothness of BW shots!).
Installed DMD glare guard film that eliminated the reflection of the DMD in the glass.
Added a Polk 10" subwoofer. That really makes the Hulk smashes HIT HARD! Very cool mod for around $100.
Getting some large shrink wrap to eliminate the silver reflectors on the Hulk lights (with LED GI and flasher, the reflector isn't needed).
Install Avery laminating sheets (easily removable plastic protection similar to Mylar) to high wear areas of the PF like the landing spots above the pops, ball drop spots, etc
Install Moleskin foam in the Hulk saucer to reduce bounce outs.
Full shop job with all new rubbers and posts. I bet the parts installed are are most likely factory stock and could use replacing.