Made an upgrade of the 9398 with XL motors and gave it 30% more additional parts. This is my MK2 version as my first upgrade was not as successful. Also it uses
LEGO - Technic Remote Control - 9398 - Car 4x4 Crawler - 2000-present - Netherlands - Catawiki
Used/PO Set – Lego 9398 Remote Control .., Dan Cook | PilotBrick.co.uk
Amazon.com: LEGO Technic 9398 Rock Crawler : Toys & Games