Next, select which model you are choosing. There are two different torso collars - They are labeled in the pic above. **Note - I combined a couple parts from earlier drawings and made the updated bushing and flange collar into one piece. You don’t want it tight at all, but you don’t want it so loose that it wobbles. Next, take the flange bushing and make sure it is able to slide onto the grey tube easily. This needs to be fit inside the white tube as square as possible and the grey tube needs to be able to rotate freely inside of it. Sanding (or lathe is handy) work may be required. Take your time as this piece needs to operate smoothly with no binding! It needs to be able to plug flush into the bottom of the white tube and the grey tube needs to be able to rotate in it smoothly. If it doesn't fit, you may have to sand it. Attach it to the servo housing top with the two long screws (The two screws MUST sit flush). Prepare the lower servo housing half by countersinking the two holes. I output my parts in white filament, but you might also decide to use green or a darker color for the inferno version. *Note – Different 3d printers hold different tolerance. I output parts on several machines and they all fit slightly different. You may have to sand the outside of the servo housing to get it to slide into the tube. A small lathe is also useful for this. Download and 3D print the parts from the links below. I designed the 3D printed parts in Tinkercad which is a good development platform for beginners.

Please don't hurt yourself.ģd printer (or use on-line print service) This project assumes you have some experience with basic shop tools and soldering. $ Various: Solder, flux, foam tape, pvc or other plastic glue $ 2 (1) 10-24 setscrew 3/4' long for regular skelly, 1/2' long for inferno My parts were printed free by my public library. You can also send files to online print services for a fee or print them at on your own. $ (1) Set of 3d printed items (link below in steps). $.91 (1) PVC retaining ring cut from coupler . $2.35 (1) Inner core tube – 1” x 10” Schedule 80 pvc pipe

$9.86 (1) Main body tube – 2”x 2’ pvc pipe Or on ebay for usually $10 cheaper (just search it). $ 20.00 (1) Servo –Feetech FT5330M available on Amazon here:

Wire grommets slot 3d print