I have gone through several ideas for tightening the locking ring on the back of the eyeball vents in the overhead, none of which worked very well. This was the best, other than a fingernail. I also cut out some spacer washers out of silicone gasket material to take up space and have something cushy to tighten against. The only idea I haven't tried yet is to adhere a 1/2 inch long piece of PVC pipe to the ring, then add holes or grooves along the top to tighten...Any other ideas out there?
==dave==
==dave==