Let's take a poll. How good is your autoguiding, and with what equipment? If you use PHD2, tell me the overall RMS error in arc-seconds.
Here's one of mine: With either a CGEM or an AVX mount, and a telescope with a tiny 35x135mm guidescope piggybacked on it, and a DFM guide camera and PHD2, I get about 2" total rms error. I tend to think I'm at the resolution limit of that tiny guidescope and at the next opportunity will switch to something bigger. Also that the seeing is not too good where I'm set up.