OmniMac Vibration Ball - Silicone Mold

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This mold is part of my 3D Printed QuadCopter project. Check out all of the files and a build log on Instructables! http://goo.gl/wD0f3K I created this mold for making omnimac vibration dampers to isolate a multicopter flight controller. They work on flight controller mounts like these: https://www.thingiverse.com/thing:160655 and https://www.thingiverse.com/thing:163494 I made the mold based on dimensions from a ThingiVerse object that isn't downloadable anymore. http://thingiverse-production.s3.amazonaws.com/renders/23/00/f6/55/49/Omnimac_v1_preview_featured.jpg The original file is unknown, but the image gave me the dimensions to base my mold on. The mold halves are the same piece, I designed it so you just print two of the same part and they fit together. There is a tapered inlet for a syringe (I used a 3/4oz - 20ml "BD" branded syringe. It's actually for baby food). The mold also has channels that link all four isolators to that single inlet. There are small holes at the end to give air somewhere to escape while you're injecting the silicone. The original isolators have a hole through them for M3 mounting hardware. Other molds don't have this through hole. My mold clamps over 3-ish millimeter knitting needles between the two mold halves to restore this hole. I bought the knitting needles at WalMart in the crafts section. They're the green ones that come in a 4 pack. I used SmoothOn DragonSkin 10 material to mold these pieces, and they're quite flexible and jelly-like. Perfect for vibration isolation. It was a little thick to draw into the syringe, but it drew a vacuum at the same time and foamed the air bubbles out of the material... An accidental "I meant to do that" moment. I assembled the two mold halves around the 4 knitting needles and clamped them together with an Irwin QuickGrip clamp suspended over a cardboard "catch" box. Then I used a shot glass with milliliter graduations to mix the silicone parts together. Then I drew the silicone into the syringe, which removed the air bubbles, and injected the mixture into the mold's inlet until I saw silicone ooze out of the bottom holes. Left it to cure overnight, and demolded the parts in the morning. I didn't use a release agent, but that was okay because I was able to pry the mold open with the knitting needles. All in all, I think this was a successful build. I got five good isolators out of eight (two molds at the same time) that didn't have air bubbles in them.