This image is a mosaic of 8 panels shot on 3 nights 17; 21 and 22 September.   Each panel has between 21 and 29 useable subs of 240s each so just shy of 12 hours of capture.
I chose to use RC8 with reducer for hi res results; final image after allowing for panel overlap and crop is 11000 x 14000 pixels so this version here is highly compressed to meet the 10MB rule.
I have been experimenting with mosaics for the last 6 weeks and used Siril scripts to assist with potentially complex gradients over each panel.   I shot the central 4 on the first night and then added the top two and bottom two over subsequent shoots.   
I found Verlaux Nox most effective with gradients having painted out the broad shape of the heart and fish head.   I used Syqon Parallax, Prism Deep and Starless for the pre stretch phases then Veralux Alchemy; HMS; Curves; Vectra and Star Composer to support the HSO palette.   On Alchemy HSO I weighted the OIII boost by 1.7x to support the blue tones / teal colouration present in images I found online and that are spread over both G and B channels, a feature of the limitations of OSC/l-enhance capture.   Final touches using Affinity and James Ritson macros.
One of the most pleasing outcomes of this project is that I identified a couple of features in the image that prompted further investigation them not being identified on app star charts.  For example the planetary Nebula WeBo1 which I initially thought was just a capture error / impact of colouring.