When I purchased my 225 I called Trail-Lite and asked them if I could order the surround Tub that comes with some other models ( the 250 + 251 ) I was told that I could not because of the curved back wall on the 225 that it can't be done. So I went to Lowes and bought a cheap surround for a shower that is 60" tall and put it in my-self,it works great , it has built in shelves in the corner ( wrap around ) for the soap and shampoo bottle, and all for $39.99 and a little cutting with a razor knife. It was pretty easy except for the back wall that curves, all you have to do is trace it with school compass that has a pencil, like you would do if you were doing tiling and needed to fit a piece in a blind corner and put it up with liquid nails.
Also today I installed dual batteries # 24 interstate Marine /RV . If you bend down the battery tray metal lip in front you can set in both batteries side by side , only about 2 inches of the battery overhang and I straped them in from the back using two nylon strapes, it came out very neat and the batteries are nice and stable. I have done quite a little items that were erking me a little bit, I yanked out the 19" TV and installed a 13 " that runs on 12/120v and has a built in VCR . I also installed a 12V 3 outlet socket by the cable booster and I ran the wires so I am using my coach batteries. I installed a screen door lock so when the screen door is in use you can lock it and I did that with a nice looking brass slide bolt that after you drill a few holes ,the bolt slide through the door frame and into the screen door locking it. ( a must for my wife!! ) I also installed a vinal venetian blind over the entry door ( 27x72 ) so when you are using the screen door you have some privacy. I won't bore you because the list goes on and on LOL. But if anybody is interested in some of the other things that I have done e-mail me. I am in the process of putting in a 7x22 inch hatch door in the compartment that I made adj to the rear steps ( left hand side ) there is an empty space there that measures 24x24 and I will use it to store the 3/4 hose for the Macerator pump that I hooked up.so I can dump at home. On the brite side, I am getting about 12+ with the 2003 Chevrolet 6.0 and it's as quite as mouse running, my wife thought that I was coasting to save gas because you can't hear the motor running at all, a few times when I first got it I would try to start it twice and get that grinding noise from the starter ( very embarrassing ) . And for the coach items everything is working great and I anve not had any problems , other than the aftermarket radio that Trail-lite put in ( had a short in it )