Loopin Louie - Central crane tower outer holder

0.20mm StandardABSWall loops: 4bottom shell layers: 4Sparse infill: 35%Infill/Wall overlap: 20% Designed for wood screws: 4mm x 18-20 mm with pan/round/tuss head max 7 mm x 3mm. Predrill hole for fastening with 2/2.5/3 mm depending on used screw internal diameter (before thread). Do not drill any holes to central crane tower base. Recommended: longer crews and shorten them to increase strength or use screw without sharp tip. Wood screw sharp tip without thread is not holding. Print 4 for center piece. Print upside down. At the bottom of central crane tower it has 4 arms holders. Next to arm holder there is just enough room for this fastening item. Place it that you can turn it 90 degrees without arm or arm extension preventing it from turning and lift the central crane tower away from "Loopin Louie - center inner holder". Install one at time to get locations correctly. It is designed to fit and hold perfectly from the top and preventing board coming off from Loopin Louie - Cent