I made a little plug-in for Aku Shaper.
The tool can produce a ready to print template for hollow board purpose.
It can be download here: http://jedail.free.fr/programs/HBTM.jnlp
Basically, after designing your board with Aku Shaper, create all the slices needed for your hollow board, launch my app, open your .brd file, play with parameters depending of what you're looking for and generate your template. The tool will create a PDF with outline, profile and frames .
Known limitations :
- Offsetting a curve is a complex problem. The approximation method I used can produce some strange/mistake behaviors. This is especially true on curves with hard edge or with curvature smaller than skin thickness.
- Frame position on keel have to be a multiple of 10cm.
PS : My tool make reference to Aku Shaper and will download its latest version on your computer. If you prefer to stay with the old APS3000 version, don't use my tool.