I managed to buy a few more supplies today and cleaned up and reorganized the basement work area in preparation for doing a bit of construction before I leave for Australia on January 8th. Constructed four sawhorses as I don't always want to be kneeling on the cool concrete floor while working. I should now have enough storage space for all cutout parts except the large panels that need to be scarfed together.
1/ I copied the patterns on to the timber using giant carbon paper (2' x 16'), available from www.boatdesigns.com . Much quicker than punching holes and playing join the dots. (I have no affiliation with boatdesigns.com - thats just where I found the paper)
2/ I joined entire plywood panels, using scarf joints, before marking out and cutting. Its awkward to manouvre such large panels, but it does mean the parts are cut out as single pieces, so theres no risk of misalignment from joining two cut parts ( I can't cut accurate puzzle joints with a jigsaw!)
3/ In making the scarf, I used doublesided tape to hold the edges of the panels - much better result.
4/ I did all my cutting using a jigsaw (sabersaw in US English :-), with the plywood supported on blocks of 2" styrofoam. The jigsaw blade goes through styrofoam like it wasn't there, yet the foam provides a really solid support to work on.
5/ to save time marking and cutting, where duplicate parts were required I stacked two pieces of ply, pinned them together with small nails (important!) and cut both parts at once. This also helps ensure symmetry. I left the parts pinned together for finishing with plane and sander.
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