We have taken suggestions from our customers to improve the TBRM. The Pro model will soon feature Dual Omega PID controllers, and a BGA cross flow cooling fan. Clients that have already purchased a previous version, may send their unit in to be upgraded for a nominal fee. TBRM was created to offer quality units at an affordable price as well as providing the features that clients are looking for. Feel free to continue making suggestions, if your suggestion is used, you will receive a credit that can be applied to the upgrade.