I've recently been home developing C-41 film with the tetenal colortec c-41 kit.
I use the Paterson reel tank and use the stick for agitation and a controlled water bath. My current theory is that it's uneven agitation and I'd be better with 30C developing or proper rotary development
I have checked and I can the lines of my negative, so I don't believe it's a scanner issue, so I'm left with a camera issue or a developing issue.
I'm using a hassleblad 500 c/m so I feel the leaf shutter wouldn't give the pattern I'm seeing?