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Chapter 3. BallistaMail > Skein Plates, Supports, and Their Attendant Mysteries - Pg. 69

MAKE: PROJECTS Eccentric Cubicle Figure 03.09: Finally! The body in detail. Figure 03.10: The body blank, awaiting frenzied holezdrillen attachment by gluing and dowelling some additional wood onto the body blank to form a pocket for the skein plate to slot into, then adjust the shape of the body appropriately. [Figure 03.09, Figure 03.10] on the skein rack plates. There's no rocket science involved adapting the skein plates to a narrower body width; it's just something you need to be aware of before you start drilling holes in stuff. This is workable. Time to rough in the body a bit more, so we can start figuring out how to get the other stuff to fit in. We're looking at a finished body about 20 1 / 2 " long, 3" high, and 1 1 / 2 " thick. The 1 1 / 2 " thickness is reasonably critical in this project, as BallistaMail is scaled to launch less-than-svelte 1" diameter projectiles. Feel free to laminate two pieces of 3 / 4 " hardwood stock to get the required width. I've drawn up the cutting diagram based on the 1 1 / 2 " width. If you decide to scale down your intended projectile to something more sleek and lethal, the only really critical measurement changes you'll need to consider involve the placement of some of the vertical support mounting holes Skein Plates, Supports, and Their Attendant Mysteries We're gonna be using 1 / 2 " OD brass tubing as vertical support components for the skein plates, with 1 / 4 -20 threaded rod running internally top to bottom to tie the whole thing together. Positioning the supports to allow maximum bow arm movement while warding off collapse under stress 58