I recently finished my HE-6se cable. I nearly lost my sanity doing those two 4-wire braids lol. Total cost was about $25.
If your buying the same 3.5mm Rean connectors I used for another HE-6se, make sure they’re the current rev which has the extended jack. Though I imagine there’s hardly any old ones floating around considering how popular these are for DIY cables.
The splitter I used worked great except that it has has a slot instead of two separate wire holes. I used heat shrink to ensure it never slides down the cable.
BOM
2X Neutrik Rean NYS226BG 3.5mm Mono, $1.33
Neutrik NC4MXX-B Male 4-Pin XLR, $4.60
AliExpress 8-Wire Prebraided cable, $10 for 5m
AliExpress Cable Splitter, $3.77
Here’s a photo with them connected. The Rean connectors look a bit bulky on them. If anyone knows of a good, more compact alternative, let me know.