Do they make all receivers for the various mfg’s?
Basically, yes. Most receivers have the same shape, anyway.
I hope they can make the power receivers smaller as my left ear canal is smaller than the right.
They can (and actually) make smaller receivers, but when you need power at low-frequencies, the receiver has to be bigger.
There is also a little bit of a turn in the canal that put the speaker to close to the wall making it very susceptible to wax problems.
The hole is already centered, placed at equal distance of every wall of your canal.
Seems to me the best solution would be no receiver in the ear, rather all done from the case behind the ear!
You’re right. “Classical” hearing aids have no clogging problems at all. But aids can help you better to understand speech. So, it is your choice.
You’re ignoring this member’s posts.