Hi Diego,
Hope you don't mind me asking a few questions -
That's ok...
Do you use a coma corrector with your 10" f4 and if so what brand/ type ?
Teleview Paracorr
What type of imaging camera do you use ? Stock DSLR, modded DSLR or CCD
CMOS cooled mono
Is your 10" f4 difficult to collimate ?
Nope, but i check it every time i shoot.
What is your auto guiding set up ?
Off axis guider. PHD2 with predictive PEC
What method do you use to locate objects with your big telescope ?
Forget about star alignment, use plate solving/SGP frame and mosaic.
Very impressive photo !!!!
Thanks... 
Thanks in advance