Yes, of course knowing your clubs is a big part of the equation to being consistent. I will say, however, that any set of clubs with a Precision 1 rating has a deviation factor that is so high, that if you do in fact have your shot go where you aimed it with these clubs, you are just plain lucky. I used to play them quite a bit when they first came out, but eventually ditched them due to this inevitable and inexorable truth.
Bottom line, if you are somehow managing to avoid the deviations most of the time, it's just plain luck, and one begins to wonder if we are all playing by the same set of rules, because I play with the most precise club set there is, know all of the courses like the back of my hand, and still have to fight the deviation beast constantly.
What happens when the shot goes where I aimed it and I don't get deviated? I end up scoring in the 20's on the CTTH, which has happened on 2 courses now. I can count on one hand how many times a CTTH round hasn't deviated my shots wildly though.
So, knowing the clubs, shots, and courses are very important, but CTTH is very much about repetition and luck.