Hey there Occ...nice to see someone else from Cincy....what part are ya in? Im about 15 miles south of the river in Nky......anyway with your question.....Greg (Tresvatos) was one of the first people to install these lights, since he did it, i bet at least 15 more have done it successfully. If you read through the whole thread he gives more details. The screws are 3mm allen head type screws. Go with stainless or anything else will rust and fail. Drill holes through the hull. Use a washer, locking washer and nut on the inside. Also use 3M marine epoxy. Squirt it all over the back before you bolt the lights to the hull. Thats pretty much how everyone has done it. I have the lights waiting to go on...just havent done it yet.