I installed keystones and had an issue. I posted about it a week ago. Thought it better to have a local shop fix it right. It works now, but a few things jumped out at me instantly. I removed the controls and found he installed a .047 cap and it lost the sparkle high. The vol pot is a linear - I will need to play with it more to see if I like it. But the bigger issue the middle position is way louder. Thinking he has wired these in series. He has the cap running from the tone pot to the third grounded lead on the volume. I've never seen that before. Can someone tell me what a 3 way middle in series would look like so I can confirm my suspicion? I will ask him to switch the cap to a .022, not sure about the vol pot, but definitely want my standard middle position back.