Great news. I have just finished designing and printing a very cool charge adaptor for the track loader. It will be available within the next couple of days. The Charger can be found here: https://www.thingiverse.com/thing:2794970

I'm still working on this project. More files will come. More description will come.

This is my take on the Mini Track loader. Instead of using an RC Remote I wanted something that would be more easy and lightweight to bring along with me on a daily basis. So I redesigned the body to get more space inside for a Arduino Pro Mini, a Bluetooth module, a small 1s lipo battery, an on/off switch and a charging plug. Plus a little extra.

https://youtu.be/NIg1I9ntlLo

This Track loader is based on the files from @lijingwei https://www.thingiverse.com/lijingwei/designs Lijingwei writes: "This is a bigger track load using 9gram servo . All parts are all redrawn based on Zedpi’s Mini Track Loader RC. The Lego track is no more supported ,You have to print track with flex material . The servo I'm using is emax es08ma , other similar 9gram servo should be ok but not tested"

Parts needed: 1x Arduino Pro Mini https://goo.gl/D2z6b4 1x Bluetooth Module https://goo.gl/hRQhzv 3x SG9 servos https://goo.gl/fRvFBf 1x On/Off switch https://goo.gl/78AyvA 1x 1s Lipo 180mAh https://goo.gl/Hp6TaL 1x 2 pin SH size connectors https://goo.gl/r2ni9r

Optional: 1x FTDI USB Adaptor https://goo.gl/Tt3dWA 1x Mini buzzer 5v https://goo.gl/62NGMi 1x Yellow 5mm LED PAD-11 Crimp Tool https://goo.gl/U5KtBk

UPDATE 2018.01.15 The android app used to control the track loader is made by Andi.Co and can be found on google play store. https://play.google.com/store/apps/details?id=braulio.calle.bluetoothRCcontroller

UPDATE 2018.01.17 The Arduino code is now uploaded. It's a very modified version of the one Andi.Co has made.

UPDATE 2018.01.21 Schematic is done. Added here as a picture and in the Post-Printing section.

UPDATE 2018.01.22 Added description for modifying the belt servos in the Post-Printing section.

UPDATE 2018.02.09 Updated files section. I had made some fuckup in the wheels and track files. Now you will have 2 options: Big track or Lego track. 4 files for each and they should be clearly marked.