Hey all I'm expanding my ball python collection a bit and I'm going to build a rack to house/breed a few more animals. Here's my plan I will build it to hold between 10 and 20 balls and I plan to use 11" flexwatt at the rear of the tubs for heat attached to a Helix thermostat. The first question is kinda stupid but bear with me. Do I buy the latching sterilite tubs and use them with the lids on or the cheaper version and use without the lids? Second stupid question, do I drill holes in the sides of the tubs for airflow or will this just increase heat loss too much? Lastly, if I simply slide the tubs in what are my odds of escape? Sorry for all the newb questions and thanks for your help. Also, if anyone has rack pics they could post that would be awesome. Thanks.