When I first had custom molds for my KS6 they were uncomfortable. At that time I happened to go to a different Costco. They said they preferred a different mold supplier. They made new molds and they worked comfortably for many years.
Custom molds should not hurt. I have worn custom molds or aids for many years. The past few years I have tried living with tulip domes.
Ok, I’ll try another Costco then. I still have a couple of months on the 180 day return policy.
Thanks.
Any chance the receiver wires are too short?
I’m assuming you’ve tried a different wire length. Even wires that look right can ‘pull’ if you have a dynamic TMJ area, especially when talking etc.
I agree to have them verify the length of the receivers. Perhaps even try one size longer to see if it helps.
Another thing to do is keep your mouth partially open when they make the impressions.
This can affect the results.