It was Ken Rizza who wrote an article about it for AAW. I don't remember what issue.
I've collected the parts & pieces for one (eBay & Amazon), but haven't had time to put it all together. Cranked all the way up though, there is more than enough airflow that it will provide a nice cooling breeze for summer months. I ordered a ballistic rated paintball mask to use as a face shield, which is much sturdier & stronger than most regular face shields.
Link for Ken.