Hi,
I do not want to take the wind out of your sails but I have never used PEC as it gave me worse results then without it.
The PEC function seems to have a problem and it is that it introduces a drift in the RA tracking. So far nobody knows why ¿?
If you are guding with PHD try to goe wodn with the guider exposure time as well as the allowed value until it should start to guide. I am guiding with a setting of about 0.15 to 0.25 pixel movement. The G11 having a decent imbalance and the guide speed setting at 0.8x does react very good to short guide impulse commands.
Another thing is you should try to guess the seeing and compare it with the guiding result in order to judge if you are not chasing seeing ...
I do not know for how long you are working with your G11 but that 10 minute exposure is by far nuch better the the results I did achieve after having the mount for 6 months.
Keep playing with the guide settings and get a feeling for your mount over many nights. You will be astonished as how much the climate changes will make you doubt about the mount and sometimes you will be amazed of how good the results can be.
The climate conditions do play a far bigger role then we want to admit ...
This you can only find out ocer a longer period of observing your results. Even better if it is permanently miunted on a pier under a Dome or a Roll Off Roof.
Happy Seeing Hunting
