The SH01s and Comgrow 2-spool dryers are decent out of the box and get the job done, but anyone who owns one knows that the fan just doesn't circulate enough air, leading to uneven drying and inaccurate readings.

Based on Anselor's Design (https://www.printables.com/model/734639) I decided to beef up the fan by strapping on a 5015 blower with a duel vent. The difference in circulation is a VAST improvement.

THIS WILL REQUIRE MODIFICATION TO THE ORIGINAL SHELL SO PLEASE PROCEED AT YOUR OWN RISK: 1 - The two towers that hold the original fan in place need to be removed. 2 - With the controls facing you, the back left support "fin" needs to be filed down or cut to make room for the fan. 3 - The standard wiring for 12V 5015 blower is barely long enough to reach the controls. It's tight, but you can get away with not messing with it. You may need to add an extension.