I bought and installed a QCTP on my lathe a while back and I like it except for the inconvenience of having to grab a wrench to change the angle to the compound. I agree that with proper planning and procedure you shouldn't have to change it much, but I have never been accused of having either, so I find the need often. The wrench is mislaid, or just plain awkward to use whenever needed so I decided to make a captive handle on a threaded adapter to replace the nut on top of the QCTP.
As with any improvement I make I wonder how I lived without so long, it is much handier and user friendly than I thought it would be. While it is not perfect and maybe not pretty, I like it. With everything I make I always see all the mistakes and think of how it would have been better if i had done it different. I have learned to condition myself to look at it a different way though and that helps. I just think that if I did not have a lathe and mill and the doubtful skills that I have acquired and someone gave me that part how would I view it then? Suddenly it is elevated in my view, usually, and looks better to me then and I can live with the shortcomings.