One of the first things new owners find is that the cup holders in the Thor A class rigs are terrible. Cup holder mods have been covered in these forums multiple times already but I am putting this thread up there for people searching for answers in the future. This method has been covered in the past so I am standing on previous posters' shoulders here.
I went the PVC coupler method. It was cheap, easy and I am happy with both the appearance and the functionality of the end product.
Parts list:
Schedule 30 3"x3" PVC coupler sourced from Lowes, $1.58 each x 4. Not all local Lowes had this part listed as in stock, which other threads here had warned of. I had to go across town to a different Lowes than I normally go to in order to pick this up. Other threads mentioned they are easy to source at plumbing supply houses.
https://www.lowes.com/pd/Genova-SCHE...ing/1001129310
Krylon COLORmaxx Flat Black Spray Paint and Primer In One, also sourced from Lowes, $3.98.
https://www.lowes.com/pd/Krylon-COLO...-oz/1000460413
Scotch Mount Double-Sided Mounting Tape Clear 1" x 60", sourced from Target, $4.99
https://www.target.com/p/scotch-moun...96#lnk=sametab
I sanded the PVC pieces before painting them. I think in retrospect I might have picked the gloss black instead of the flat black but I am still happy with the results. After the paint dried I wrapped what would end up as the bottom of the PVC piece in the mounting tape and peeled off the outside part of the tape. Now it is just a matter of shoving them down into the cupholder until they reach the bottom. The tape is thick enough that it creates a solid connection between the PVC pipe and the bottom of the cupholder. If need be I am confident I could wrestle the pipe back out if I really wanted to, but it sure isn't just going to fall out.
The wife is quite happy with the aesthetics and the usability of the results, and I was able to do four cupholders for about $16 or so.