For the cowl you can check out www.pspmfg.com for their 'cowl binders'. Slickest pieces of machined neoprene on the market. Hold fast, won't chew up the cowl from vibration and last forever. Forever is a long time. $3.00 will get you six of them I believe. There is a base and a cap that interlock and pinch the cowl material. To hold them, on they supply wood screws that seat in a little anti vibration gromett. Got them on all my planes. BTW, they look good too. Joe