In my rubbermaid adventures I have discovered several things that might be helpful so I will just fill you in on those and let the DIY article cover the basics.

In order to easily heat the enclosure, I recommend buying something low profile (i.e. 5-7 in. high). The rubbermaids that I am currently using are 31'' x 16'' x 6'' and cost around $7.00 at Target. The low enclosure has several advantages: it is easier to heat due to less air space and it makes the ball python feel more secure. I heat each of the tubs with an foot long piece of 11'' flexwatt that runs off of a Ranco thermostat. If you need a good place to get heating equipment, I recommend Matt @ www.mgreptiles.com (it seems like i have been giving alot of matt recommendations lately...ha ). Also, If you are using an individual enclosure and want to make sure the top is secure, binder clips work very well. If you would like the front of you rubbermaid to look nice. Simply do not put any ventilization holes in the front and put a few extra in the sides. IMO..This shapens the appearance of the enclosure. Also when putting any holes or trying to cut the rubbermaid, I suggest using a soldering iron if you have one. This will prevent the tub from cracking and will save you alot of time...believe me. I hope that ramble helps a bit. IF you have any questions feel free to ask (i will not refer you to another page next time...I promise )