OG star tracker stationary part and 3/8" camera holder for Smallrig Selection tripod

Hi, 

I got a Smallrig Selection tripod, which already seemed sturdy enough for using with the OG star tracker. 

But I was worried, that the default ¼" stationary part wouldn't be enough, because had problems with the 3d printed threads getting ripped apart (and I don't want my telescope to fall onto the ground…). Also the mounting surface just seemed to small, what introduced a lot of wobbling.

That's why I tried making the contact surface bigger, and replace the 3d printed threads with metal. 

I also made a new camera holder, that replaces the original one, because mine supports 3/8", so it allows using the ball head of the tripod.

Metal parts you need:

• 4x 12mm M3 hexagonal socket screws
• 1x 8mm M3 hexagonal socket screw
• 5x 4-6mm long M3 threaded inserts about 
• 1x M5 hex bolt nut
• 1x 15-30mm 3/8" screw 
• 1x 7-17mm 3/8" screw

Yeah, I used a M5 hex bolt nut, I just trust it the most for that job, I already managed to rip out some threaded inserts.

One of the 3/8" screws is being used for connectiont to the tripod, the other for the ball head. I bought the the 3/8" screws as a set of two (was just cheaper), cut one shorter, but probably you don't have the gear for that. 

If you can't get one length of the 3/8" screw that fits for both or two different lengths for both applications for the 3/8" screw, just write a comment. I could design a new big pulley, which supports also longer 3/8" screws than those 17mm, if there's demand for that. 

I think it should be also possible to replace the 4x 12mm M3 or that one 8mm M3 screw with one type, I only used different ones, because I had them lying around and didn't know, which are being used in the current version. Just write a comment, I could easily adapt it, so that you only need one length of those screws.

I hope printing and assembly is self explaining with the photos.

Feedback is appreciated.

Have fun!

PS: Idk how to name that one small part else