I am replacing ports in an old Allmand 35. What a job! They're the plastic opening ports from Gray Enterprises (Pompanette) that you see on a lot of older Hunters. Screwed in from inside with a protruding lip and trim ring on the outside.
The cut out in the coach roof was oversized by 3/8 to 1/2 inch. The gap was filled with sealant, looked like silicone. I took a worn out blade for my Dremel MultiMax, filed the teeth off and rounded the corners. It cut through the silicone fairly quickly and shortened the length of the job. It works way better than a 5 in 1 knife or hand scraper. I seem to recall a lister who was developing a prototype scraper blade. However, there are several commercially available now to fit a variety of vibrating saws. I also ordered a commercial scraper blade for my MultiMax, it's Dremel part MM610. Much wider than my home made one. The Bosch OSC2FSC blade looks good also. If you are thinking of looking into them be advised that they come in rigid and flexible blades. The flexible blade is able to get under flanges, etc. and still have the rest of the blade held off the surface. I'm thinking that people are using these scraper blades to remove layered bottom paint now also. The vibrating saw has become one of my "go to" tools for boat work. Great for making cut outs for VHF or stereo installs. Dennis C. Touche' 35-1 #83 Mandeville, LA
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