richeydog, sorry to hear about the dust cap and your hearing

Your thread really helped me though so thanks! I have a pair of ONIX minis and both dust caps
were dented and have small pin holes from previous attempts to fix them. The hair dryer for 30-45 seconds softened them enough to pull them sideways with masking tape. Both dents have been removed. It really bothered me even if it had no audible effect but they look much better so thanks again!
BTW, the mini dust caps look like they are probably almost exactly the same basic semi hard plastic material in case anyone has the same problem and wants to try it.