From what I can recall, Jim Phillips stated add about an extra 1/8th of an inch to allow for removing planer marks, final sanding etc. But at the end of the day too much to start with is better than too little.
I would make the rocker templates at least 1/4" bigger top and bottom. After some trial and error you may find that the extra thickness is not needed. There’s alot of stuff that can move around when gluing in the stringer. Also make sure your halves are square to each other before gluing everything back together. Over here at the Low Tech Lab we have found that 3M masking tape works much better than clamps for our stringer gluing. It’s also best to have two people but it can be done with one…
Making the rocker templates…
After cutting out your hardboard tape the two templates together. Now drive your self crazy taping and untaping your two templates while getting a perfect pair! I wrap tape every so often and I use a bench top disc sander to sand both templates at the same time. Drill your mounting holes through both templates while they’re taped together. Now your holes will be in the same place on both templates. With 2# EPS I use 16d nails to hold the templates to the block foam.
My Rail band cutter is just a small version of my big Hot Wire cutter. Nothing fancy. It is nice to trim as much material as possible with the hot wire to cut down on dust. The fumes are nasty ,make sure you have a good fan and an open window.
Stingray
Mr. L.
Thanks for the vid. I guess I’ve been out of the forum for awhile, just moved. Thanks for the help. Gonna look up the vid tonight.
Thanks for all the help on this thread guys. You all rock.
J.D.
get any boards finish BadHoudini? any pics? i'm interested to see your results...
XPS is intriguing. i've heard many people comment on how good they feel
despite glassing issues...