AV Bay for dual EasyMini Altimeters. Designed for 1.6" diameter rockets. It should fit in most cardboard couplers, may not fit in thick wall fiberglass or carbon fiber couplers.

Lightly sand and apply very thin layer of epoxy to glue top and bottom part of the sled, keep clamped until epoxy cures.

Extras needed:

• Balsa Machining Services C60-34 coupler (cut to 6" in length) link.
• 2 Altus Metrum EasyMini altimeters link.
• 2 RailButtons switches link.
• 2 #4-40 3/16" screws (switches ship with too long screws, replace with these, or cut to length).
• 8 Labrat Rocketry terminal posts, 3/16" size link.
• 16 washers for posts (small outer diameter washers, not regular size).
• Two LiPo batteries, 3.7V 220mAh, pay attention to size so they fit.
• 12 #4-40, M2.5 or M3 heat-set inserts for plastic.
• 12 #4-40 1/4", M2.5-8 or M3-8 screws (prefer cheese head if metric).
• 4 empty brass cartridges (cartridges between 9mm and 45 ACP should work, depending on amount of ejection charges needed).
• 4 M2-12 screws, 4 M2 nuts, 8 M2 washers (for mounting cartridges).
• 2 #6 threaded rods (cut to 8.5" each).
• 2 #6 nuts, 2 nylon insert #6 stop nuts, 4 washers, 2 lock washers
• 2 pieces of Kevlar for attaching to shock cord; need to fit inside attachments on bulkheads (1500 lbs Emma Kites Kevlar Line should be OK).
• 22 AWG wires, silicon insulation recommended for flexibility and wire routing.
• Zip ties, less than 4mm wide recommended.

Tip 1: Cut wires that connect to terminals longer on one side, so that they can be connected and disconnected to/from terminals when putting sled in and out of the coupler.

Tip 2: Holes for the inserts and screws may print slightly undersized; drill to correct size as needed after printing.