Has anyone tried using Nicefit? Nicefit
or tried the impression material sold by Soundlink?
Like this? uxcell Silicone Tube 2mm ID X 3mm OD 16.4' Flexible Silicone Rubber Tubing Water Air Hose Pipe Transparent for Pump Transfer https://www.amazon.com/dp/B01MXJHJ6E/ref=cm_sw_r_cp_api_i_mgoxFbGVDE1W6
Anycubic makes a washing a curing station that works pretty well. my printer is larger. My print volume is larger so some of my prints wouldn't fit so I had to make my own.
https://www.amazon.com/ANYCUBIC-Photons-Printer-Cleaning-Machine/dp/B083GTS8XJ/ref=sr_1_13?dchild=1&keywords=elegoo+UV&qid=1596116563&sr=8-13
Congratulations on your first build. If they start to give you headaches, it might be caused by the cable digging into your temple. I say this because I notice that you have the connector parallel with the faceplate instead of with the Helicis Crus, most human ears are at an angle to the head so if your cable is parallel with the faceplate, it might cause you some discomfort. Hopefully, this will not be a problem for you but its something to think about if you find them to be uncomfortable with extended use.
Another thing to consider is adding bluetooth 5 mmcx adapters. Once I did this, I can't make myself use a cable any longer. https://www.amazon.com/FiiO-UTWS1-Bluetooth-Connector-Earphone/dp/B081MTC3ZL/ref=sr_1_9?dchild=1&keywords=trn%2Bbluetooth%2Badapter&qid=1594783890&sr=8-9&th=1
How many rails do you typically utilize? For a two driver crossover I am imagining 4, yes? I'm considering putting together a headset with tiny breadboards above each ear for prototyping purposes. That way I could relax and spend an afternoon with a configuration before setting it into a build.