Hello, I image unguided with canon 600d and 650 mm focal length my mount is EXOS 2 GOTO (it's a EQ5). I am wondering if I can extend my exposures so I get less trailing by tuning my mount , not so long ago I did service it and eliminated backlash and tightened everything so there is no play on both axis. Could I do something more to my mount i case of mechanics to make tracking more accurate or now it only depends on polar alignment? Also I did a "test" today I don't know if it brings something but I aligned my dslr so the RA axis was horizontal movement and DEC was vertical movement when i pressed controls on the remote . I took a 10 min exposure and the star trailed to the right in the RA axis. I found a DARV polar alignment on the internet - should I try that before I do anything else? I'd be happy of any advice given. The photo below is the "test" I was talking about the star in the photo is Mintaka it was due south at the time.