Tamiya FF01 Rear Arm Wheelbase Adjust

These rear arms are a direct replacement for the kit parts and allow upto 3mm of rearward wheelbase adjustment by installing spacers either side of the rear upright. Full forward is kit setting. I recommend getting the TL01 suspension shaft set 53301 as you can use the 37mm shafts for the outer pivot. I have run these in the Versatile Plastic and they're easily strong enough for running and racing.

You need to install camber links to replace the kit upper arms. I recommend tamiya 54868 medium reinforced adjusters and 54247 3x18mm aluminium turnbuckles set up with 5.5mm gap between the adjuster ends. You'll need Tamiya 5mm ball screws on the tower and upright to connect these new camber links. 

Cut the parts from the sprues holding them together. You need to ream the pivot shaft/screwpin holes to 3mm, and tap the shock mount holes to M3. You might need to sand the inside faces of the pivot lugs where they meet the chassis and the c hub, depending on tolerances. 

There is an installation blog here: https://www.tamiyaclub.com/forum/index.php?/topic/95295-thunders-ff01-bandwagon-jumping/&do=findComment&comment=852259