Steve, Sorry for the delay in getting back to you. If you haven't already finished the job, here's my 2 cents worth: The buttons I used for the bimini came from Outdoor Textiles http://www.outdoortextiles.com/home.php However, I looked at an Airstream travel trailer yesterday and "discovered" their push button locks that they use on cabinet doors and drawers. I wonder if I can find those in stainless steel ....... and I'm wondering too if a simple fix wouldn't be to just insert a clevis pin hung from a short lanyard when ever the weather is such that I install the hatch boards. I've thought too of locking the boards and slide with a clevis pin too. Electrical - I used the West Mariner coax bulkhead/deck feed through ($9.98) inside a cable clam waterproof through-deck fitting for the radio. I had to drill out a larger hole to accommodate the feed through. I used the WM four prong chrome-plated brass electrical connectors (pg 619) @ $14.99 for the electrical fitting.