Followed instructions and ended up with a very effective set of earplugs which are much better than the foam ones I have always used. Made one pair and have enough to make another set. Would highly recommend.
product received quickly and when tested before installation worked perfectly. After installation worked well for a few rides but then started to malfunction. The temperature control became erratic and then failed to work at all. Had to strip off bike and return. now ordered Datatool set instead.