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The Dagu T'Rex tank chassis is great but:

  • The suspension capacity doesn't match the motor capacity
  • It throws it's tracks a bit too often
  • the tracks become misaligned and then slip on the drive gear

The attached files are for a suspension upgrade (helper springs - you keep the originals too) and an assembly to carry a high mounted cctv camera, video TX, a RC receiver and some rails to which you could fit just about anything. We are going to fit LIDAR.

I've attached lots of photos that should explain how it all goes together and the components in the Rhino file are laid out in-line for assembly. If it makes no sense let me know.

I've also attached the Rhino file so you can easily modify anything you like.


You will need 100mm RC Car suspension, and some M5 and M3 screws in addition to the printed parts.

First job: drill holes in the original suspension arms that you attach the upgraded parts. There is a drilling guide for this - see the photo for how that works.

Next job: there are spacers (look like rods) that are 90mm long. assemble the suspension using these instead of the springs. These put the suspension mounts in the right spot. You can test for clearance etc then drill the holes. There is a photo for that too.

For the rest, I think you can figure it out from the photos.

NOTE: if the photos make sense to you, you know what you are doing. Otherwise, this is an expensive and not that simple project. Have a long think about it before drilling holes in your T'Rex if you're not sure you need to do this!

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The original Dagu chassis is made from steel and zinc components.

The upgrade 'chassis' components are just white ABS and of course the springs are 100mm pre-assembled steel. The idea is just to add 'helper' springs to keep the tracks on and increase capacity to carry load.

It works fine. The problem with this Dagu Chassis is the motors and gearing. I upgraded mine by replacing the motors and gearboxes with higher powered, geared motors.

what materials are used here? looks like metal but i know there are some great colors of filament out there :)