After my brief attempt at Thor's Helmet last year I decided to make a new attempt from downtown. This is 10h16m (22x8m of Ha, 27x8m of Oiii and 28x8m Sii) with the typical Hubble palette mapping.
Oiii is the strongest signal on this one, which is also the weakest signal downtown, which added to the challenges. I calibrated with bias, dark and flat frames (flats for Oiii/Ha only, Sii still has issues)