Anything you build will be great if it works!!!
Back heat or belly heat really depends on the environmental conditions that the rack is kept in. I have been told by other members on this forum that back heat seems to work best in a warmer room and belly heat works better in a cooler room
Also, run your tab prior to building to make sure you're saving what you hope you'll be. I have found that Rich's rack prices are really good given that he includes shipping and tubs![]()