Here is my Korber RH. I built it over 15 years ago. The pics are from my old layout. Keep in mind, if you purchase an "older" kit, you may have problems with warped walls and parts that do not fit. Plus, the window castings were not that great. My RH door plastic castings were all warped and required a lot of work to get them straight and installed. I am sure the "newer" kits offered by Mr. Muffin are a lot better as far as quality.
BTW....my TT was a 20+ year old Bowser unit.