Remixed from The O'Cello http://www.thingiverse.com/thing:1703629 and https://www.thingiverse.com/thing:2672095

This are some add-on extras for the wonderful O'Cello. If you make the O'Cello then you can also add these if you like to improve stability without the tripod.

I have designed a chest-rest, a 4th finger position, and knee braces. I currently have the chest-rest/finger position super-glued to the middle part and that part attached with velcro to the O'Cello. I hope to change this to attach it to the second bolt from the top, but I am working with the O'Cello creator to modify the original parts to accommodate this.

The 370mm offset L aluminum bar is attached with the existing 45mm M5 bolts. The bars I used was Hillman 1/16" x 1/2" x 3/4" - 3feet

You may also notice that I drilled a hole in the last piece so that the center rod could extend all the way to the ground. I then added a clamp with a thumbscrew and put the extra rod part side-by-side -you will have to cut to fit your own playing method.

UPDATE:
I've uploaded a version of the middle part of the chest rest which should fit into the current version of the O'Cello.

UPDATE 2:
I really liked the Scroll'ello for you O'cello, but I didn't want to reprint my O'Cello Part 1 because I made it out of carbon fiber PLA to withstand the string tension, so I made it a cap which you slide over the original Part 1. I got this idea from the Hovalin Neck Topper https://www.thingiverse.com/thing:2113171