Sat in a hotel room last weekend with not much to do. I'm cogitating on my first build, which I want to be very simple, so I originally just sketched a two-curve profile. Looked rather boring, so I started exploring profiles. To make a long story short, I ended up writing this:
http://pulpitrock.net/profiletool
I just finished this first version, haven't even used it yet. It's a javascript program in a web page; it doesn't interact with a server or store cookies, or any of the dangerous stuff you want to avoid. However, this means you can't save your work, yet.
It depicts a profile as four ellipse segments, SW, SE, NW, NE, on a grid with dimensions corresponding to a 4x8 sheet of plywood. The default shape is a angib's pico; you can revert to that at any time by refreshing the page, but you'll lose your work. You can select an ellipse and modify it; the red boxes let you drag the four radius extents, the green box lets you move the whole ellipse. The foci are red crosses. The undo button lets you restore back to the state prior to the latest modification.
It print previews okay, so it should print fine. You can zoom in and out with the browsers Ctrl-+ and Ctrl-- EDIT: Actually, I found out that I used the wrong coordinates, and if you have scroll bars in your browser window, modifying the ellipses won't work. I'll try to fix that this weekend. EDIT2: Fixed...
I'm guessing on how one would want to modify the profile, so your feedback on that is welcome. I'm considering more changes, particularly to draw measurements and guides for use in actually laying out the profile full-size on wood.
Anyway, have fun with it...