They keep posting and posting!

Yesterday there was a short video about a
Peterbilt tuning shop:
What did they do with the air brake knob (at 5:32)? Are those two round things (one of them has Texas on it

) just covers, or they replace the original knobs? Both options (with two sticks gearbox

) can actually be a decent anti-hijacking device, for people who got used to work with normal controls.