[Parks]

We machined rings to lock the drills in high speed. They work really well and so far we have had no problems.
We also machined parts to lock out the clutch mechanisms too. I would not recommend the latter as it is quite difficult to put them back together without causing permanent damage. But it still works fine.

I highly suggest that all teams lock at least their transmission into gear. The shifters slide very easily and can cause much grief.