That IS good news Al, I've been waiting for more results from your coolers. I think they are still a great idea, and I wondering if it wouldn't be possible to plumb in some small fan's for cooling during ground running? When I was helping my father re-built a VW bug, we put these niffty little fans in the heating system to increase the airflow, they were in a 2 1/2" PVC pipe [ I think..], they came w/ mounts to mount them down etc, all you'd need to do is plumb them [ I know.. into a closed wing..] so that they dump air into the cooler plenum and give you some level of cooling? They can flow something like 300CFM.

 Getting all the air to flow through the cooler might take a bit more work,

I think that is more than a bit of work; plumbing in the little blower and; you have to close the air inlet.  A hinged baffle that closes by gavity, and held open by airflow?  300 cfm would handle about 12-14 hp engine output. Could help.  Where do you get the little blowers?

 Al