Jo
I went with the belly heat and I used 4 inch Flex Watt.
I used a #6 x 2 inch deck screw for the main construction, but I found that with the Melimine if you are not careful they will strip. I may at a later date remove them and replace one at a time with a larger screw, but we will see. On the back I used 3/16 hardboard I wanted something thicker like 1/4 inch but was unable to find what I wanted. I found some peg panel board screws #8 x 1 1/4 inch that I used on the back and they worked out great.
32 Qt Tubs 18 X 7 = 126
9 pcs 23 3/4 x 48 Melinine 9 X 10 = 90
50' Melimine Edging = 10
Aluminum Tape = 7
Screws = 5
Back = 10
The toal with out the heat tape and Helix was $248 plus tax and 4 hours of time
I also used a 1/4 sheet of mdf as a spacer between the tubs and shelves as I but it together but I would use a 3/16 if I did it again. A 1/4 was alittle to much.
Here is a pic of the heat tape. I taped the 4 inch flex watt down in a couple of spots with aluminum tape. I then used some 5 inch real thin aluminum I had to go over the flew watt to help protect the heat tape from sliding tubs over it.
https://ball-pythons.net/gallery/fil...8/HeatTape.jpg
https://ball-pythons.net/gallery/fil.../HeatTape2.jpg
Thanks Richard