Thanks all for the helpful info.

I may just "splurge" and spend the bucks on the hole saw. I want the job to be as close to perfect as possible. The boat's still basically new and in near perfect condition, so the thought of taking a saw to it makes me cringe as is. But I really miss having portholes in my hulls. I don't understand why Hobie never made them standard on the 17...but I guess that's a moot point now.

sm