Hi Paul
Your sensor line is common, especially among Canon DSLRs. I've made several threads about this on various forum
https://www.cloudynights.com/topic/7...#entry10797016
^ good solution from my thread at CN
https://forum.startools.org/viewtopic.php?f=10&t=2043
^ StarTools couldn't remove it, but there was a decent output from my thread at ST
https://www.iceinspace.com.au/forum/...d.php?t=188895
^ My local thread, where I managed to clean it up by NOT using Bias frames and making sure I take a lot (a lot) of lights to swamp the signal
Good luck. I have resolved to use this year to learn as much as I can before biting the bullet and getting a dedicated astro-camera, because DSLRs just have too many compromises (for me).