This is V2 of my first TH8A reverse lockout mod. 
This locks out Reverse and 7th gear not letting you get past those gear gates at all to eliminate all possible mistakes.
E.G. You can use 7th as Return to Pits functions in AC.

This version is for use with the original metal gear/gate plate.

*** This one will not work on the TH8S ***
 

Additional parts you will need:
1 - Qty 1 - spring 0.4mm, 50mm, 10mm (0.4mm wire thickness/diameter, 50mm spring length, 10mm spring diameter)

       (The wire thickness/diameter can be larger for more resistance, but this works just fine for me as it's what I had lying around. 
       I got mine here : [https://a.aliexpress.com/_mNLG1H3](https://a.aliexpress.com/_mNLG1H3)

2 - Qty 2 - M3 screws 30mm length

Print Settings:
The pull up Knob and knob retainer have XY hole compensation set to 0.125
The cylinder/gear blockers have XY hole compensation set to 0.250