Loose fader caps info

Hi I just thought I would share this info as I hope it is useful for people.the fader caps on my rr felt loose,I have been jnhappy with it,I took it back to the shop and the guy explained they are p lock caps (designed to stop people pinching your fader caps) anyway these tend to wiggle about a bit but there is nothing actually wrong with them and they are used on most controllers now ,the guy at the shop took mine off and put normal fader caps on as I prefer them to not wiggle,but just a heads up for anyone who experiences the same thing !