The upgrade kit consists of 5 parts:

Front Bumper
Set Mini-Explorer
Fuel Tank Stand
Rollbar
Wheels
All parts fit entirely in the Open R/C F1 and do not interfere with the electronic kit. They are modeled to be subject to the F1 body by pins supplied.

Kind of Filamento to use:

PLA
Use on: Set Mini-Explorer, Fuel Tank Stand, Front Bumper

SoftPLA
Use on: Wheels

ABS, Taulman or PC (polycarbonate)
It is recommended using this material for its high impact resistance at: Rollbar.

Enjoy!!!!!!!

P.D: For the assembly see the second picture.

Thanks to Daniel Noree For the Open R/C F1 files