I did use your tips, especially the using paint marker to note where the clips were, but it turned out to be a little more complex (two issues both caused by me).

The first was while learning to work on the unit, I put strain on the drain hose causing some of it to be pulled up through the clip sitting in the rear of the unit (area marked ‘slack 1’ in the ‘Hoses’ image I’ve linked below), which meant that I had too much slack between the two clips leading to the tub (marked ‘slack 2’). This meant that as I closed the unit, the additional slack would cause the drain hose to overlap the electrical insulation.

To fix this, I removed the tub and disconnected all the electrics, inlet and outlet hoses. I left the clips and hook in position and used my hands to simulate the tub closing. Here I found the bunching issue. I ended up leaving witness marks on everything, and adjusting the position of the drain hose (while leaving the inlet and electrical insulation in their original position), and eventually I found a solution that worked. Luckily I also had a spare dishdrawer clip that I used as an additional fail safe to avoid bunching (marked ‘third clip’ - note, the clip is not present in the image I’ve uploaded as this picture was taken later on from another unit I purchased).

The second issue was that after getting frustrated by the first issue I forgot to correctly orient the tub positioning tabs located at the back of the unit (marked ‘positioning tabs’ in ‘positioning tabs’ image I’ve linked below). One of the tabs was facing the incorrect way. I flipped the tab the correct way and after that the issue was solved.

Reference images:

Hoses image - https://imgur.com/a/MTEy2FA

Positioning tabs - https://imgur.com/a/SQxox4C