I can get a decently deep insertion with the L final e tips, but my ears also seem to slowly push them out. I think thats one of the hard things for me, getting a deep insertion that seals and doesnt slip out over time (I might need to clean some earwax). But I think Ill try out some acoustune aet08 medium since I can get them inserted pretty deep and sealed with some wiggling (at least it seems sealed, still get good bass response), the question is whether they will stay and whether they will remain comfortable for more than maybe 15 or 20 minutes (as seems to be the comfort threshold for me). My biggest issue with comfort seems to be related more to pressure points. So the thought here was that a custom tip was that it would increase contact with my ear and spread the weight out and eliminate the pressure points. As for moving the IEM farther out, yea... it would be silly with how big it is, but I also havent noticed much change in sound due to shallow or deeper fits here, so thats not much of a concern. Comfort is the real concern.
I have my own minor gripes with the earhooks. I like that they are nice and flexible, but the rubber sticks to my skin just a tiny bit which makes adjustment annoying since the earhooks dont really move though I guess that can be a positive too since it could allow for some assistance in holding the iem in place better. I dont really subscribe to cables altering sound (at least outside of resistance and stuff) so ergonomics would be my number 1 priority if looking at new cables. And other than the earhooks, the ergonomics of the stock cable are just excellent. As you say, no tangling, extremely low microphonics and the quality of it is excellent.
I knew these were going to be difficult fit wise when I got them, but its definitely been a challenge. They are just very very pleasant to listen to, do so many things right, and most importantly, match my preferences quite well, that I think the fiddling is worth it, especially because I would rather not go through the hassle of having to sell them and then continue searching for something to take its place (and potentially have to sell those, rinse repeat).