FishWithFeet,

 

Ahhh... A Sigma and 150-200mm, 1/3s shots!  No wonder you're getting along better.  Are you working unguided? 

 

My D5300 + scope were at 621mm and my PA exposures had to go out to about 15s with that combination (trudge, trudge).   
So I had both the slow exposure rate and the folder setup/teardown time - just didn't make sense vs the faster guidescope w/ its camera.

 

Mounts: ES PMC-8 EXOS2

Scopes: SV 102EDT, ZWO 60/280 Guide

Cameras:  Nikon D5300, Altair GPCAM2-IMX224C

Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64