hi There are 4 screws that hold the scuttle vent to the scuttle on the TR3. Any idea of size? 3/16? #10 the dreaded BA? thanks Frank Fisher **************Ideas to please picky eaters. Watch video on AOL Living. (http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/ 2050827?NCID=aolcmp00300000002598)