Has anyone gotten this monitor to sync at 1024x768? When I try 1024x768 @ 60 Hz from my Raspberry Pi B+ (w/Gert's VGA666) it looks like it’s displaying alright, just not synced horizontally (the full range of the H-sync adjustment doesn’t quite get it there). Would a different potentiometer (greater possible resistance) help? (Sorry if that’s a ridiculous question; I’m fairly ignorant on analog CRT electronics!)