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** Since you are drilling through steel guided by a pilot hole in the rib's web, best to first drill with a sharp 1/8 carbide drill bit, then upsize to #12 | ** Since you are drilling through steel guided by a pilot hole in the rib's web, best to first drill with a sharp 1/8 carbide drill bit, then upsize to #12 | ||
* Step 5 | * Step 5 | ||
** The kit comes with three 3 inch cutting discs for trimming acrylic ([https://store.vansaircraft.com/norton-cutting-disc-3-tool-3-cutting-disc.html Norton Discs]). You might have to enlarge the very small center hole to make it fit your grinder. | ** The kit comes with three 3 inch cutting discs for trimming acrylic ([https://store.vansaircraft.com/norton-cutting-disc-3-tool-3-cutting-disc.html Norton Discs]). You might have to enlarge the very small center hole to make it fit your grinder or to fit into a cut-off disc arbor. High rpms are not necessary for cutting acrylic, an arbor in a standard drill works fine. | ||
[[Category:Hints]] | [[Category:Hints]] | ||
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