Not much I can add other than...make sure your first shot is level (ive got a built in bubble level on the agnos rotator), I'm experimenting with shooting in RAW barring a couple of issues documented elsewhere, set the cam up for one shot and keep those settings as you go round for the rest of the shots, always better to underexpose slightly rather than over expose.

Have a bash and then ask for any help with any issues you've had. I loved my wee 0-360 but the results with the sigma are amazing!

F