Since we’re the only two people conversing in this thread, the forum “AI” is probably going to start nagging us about that.
But my experience is because of irregularities in ear canal shape, I really couldn’t control occusion very well with domes, etc. A custom mold (as made by ReSound out of silicone) fits better, is more comfortable than some occluding power domes, tulip domes, etc., that don’t fit just right, is easier to clean, the receiver opening is more recessed and rarely collects any wax, and with the select-a-vent and feedback tests one can tune the degree of occlusion as much as one wants and change it at any time - it’s not a permanent decision. With the ReSound fitting software, one can run a feedback calibration test at any time, one can specify the type of ear insert and the size of the vent opening for custom molds, and one can tell the software whether to take the degree of venting into account in cooking up the prescribed fit.
BTW, if you search on “Doc Jake mold” (without the quotes), you will find a host of recommendations by the good Doc to get molds. The one that stuck in my mind was when he dissed Don for “wasting” a guy’s time by trying to help him with power domes but here’s another one that comes up:
https://forum.hearingtracker.com/t/molds-vs-domes/23355/7?u=jim_lewis
And more: … (just a small sampling - and among the more polite ones!)
https://forum.hearingtracker.com/t/first-trip-to-costco/20953/14?u=jim_lewis