I have done it myself....in a bit of a rush to get off a newly renovated mound so that I wasn't inconveniencing the next shooter, picking up a mat and rest in the same hand, and end up putting dirt where it shouldn't go !
The smoothness comes from the fine teeth, which means they are more easily affected by dust/grit etc than a typical single post front rest with a really coarse thread.
Seb serviced mine in the video that has been recorded by Tim and Craig and it's not really that big a deal. It just needs to be done in the right order , and following his guidelines.
Mine was nearly two years old, and if it needs a full service every twelve months or so, then I am honestly quite OK with that. I don't think it's too much of a price to pay for the sort of smoothness that the user gets used to in about 1 millisecond.
