Opus BT-C3400 Double Base for 1-120mm fan

This base combines 2 Opus BT-C3100 or BT-C3400 chargers over a single 120mm fan. I remove the tiny original fan but you could leave it disconnected if you want. You can power the fan from the 9v input directly. Most 12v fans will run well at 9v and start as low as 5v. I would not power the fan from the original fan header because it's only 5v. The one inch tall feet get mounted wherever you want in the base by drilling holes and put a 3/4" #8 screw into them from the inside. In the photos you'll see that I combined two bases to put 4 chargers all in one. The two bases were glued together with JB Weld 5 minute epoxy. It doesn't affect the PETG.