Air Compressor Aftercooler/Dryer

My air compressor had been putting out visibly humid air so after scouring the internet, I decided it was time to try to build an aftercooler or air dryer. Some of the ones I saw weren't cooling the air very much, so like everything I do, I wanted to go overkill on this project. I found the biggest oil cooler I could, then found the highest output fan I could and had to plumb it somehow. Since aluminum and copper don't do well together (https://galvanizeit.org/design-and-fabrication/design-considerations/dissimilar-metals-in-contact) I added a steel coupler in between.

Oil Cooler (Tru-Cool H7B): https://amzn.to/2LCMXAc - $85
Flex Hose (Flexible Metal Hose with 1/2" ends, 24" long): https://amzn.to/2okvpzN - $40
Transformer (240v to 12v 20A): https://amzn.to/2okqj6L - $22
Steel Swivel Coupler (2): https://www.fastenal.com/products/details/421223 - $9/tax
Water Separator: https://www.harborfreight.com/12-in-standard-air-filter-68279.html - $20
Radiator Fan: eBay search for "Universal 12v slim push pull racing electric radiator fan" and it should be about $20-$22. The listings expire too quickly to put a link up.

Grand Total for Parts: $197