OK, here's my list so far (after 6 years of upgrading, tweaking, tinkering, etc):
Electrical (mostly done for boondocking):
Upgraded batteries to pair of Trojan T105 6V golf cart batteries
Upgraded converter to PD9160 3 stage converter with charge wizard
Upgraded wires going from converter to battery, to handle new converter's charging amps
Added 12V outlet (wired directly to batteries) in front bedroom for DW's CPAP machine to work off batteries
Plumbing:
Added Accumulator tank, so water pump wouldnt run as often
Changed piping to/from water pump to 'soft' pipes, to reduce vibration/noise
Installed drain plug in very bottom point of FW tank, to allow it to fully drain when winterizing
Built Sewer hose holder from 4" PVC pipe, mounted on top of back bumper
Quickie-flush tank rinser on black tank
Stability (when parked):
Built 'redneck wheel chocks' out of 4x4 post and threaded rod, very popular mod on here
Added mid-ship BAL C jacks between axles (detailed in
THIS thread)
Built blocks from 4x6 post to use with stabilizers, mounted/stored on I-beam (detailed in
THIS thread)
Built DIY stabilizer bars mounted onto scissor jacks to remove side-to-side movement, described, pictured
HERE.
Miscellaneous:
Replaced bathroom doorknob with locking one
Built ladder and railing for rear bunk
Replaced heat vent in bathroom with 'diverter' type, that you can adjust opening on
Plexiglas inserts in screen door (VERY great mod, as already noted)
Attached plexiglas plates behind/around stove, to protect walls around it from backsplash, etc.
Upgraded all 4 wheels on tote tank to true pneumatic tires (detailed in
THIS thread)
Built small rack on A frame that allows us to carry outdoor rug on it, behind batteries
Well, thats 'bout all I can think of, strictly with the trailer. Definitely some great ideas in this thread..
Will and Cheryl
2021 Newmar Baystar 3014 on F53 (7.3 V8) Chassis ("Brook")
2018 Jeep Wrangler JK ("Wilbur")