This is my 1st attempt to DIY the KC7 using mainly parts recycled from my previous DIY(s).
I have not install the KC7 as yet, since I will require one of my "non-favoured " CDP to be the test unit aka "guinea pig"!
As to date, I have only used a multi-meter to ensure connectivity of the solder parts (where possible) following the instructions for the KC7 e.g clock from CDP, test for voltage before IC and the J309 is inserted.
You can E-mail Elso for the details via DIYAUDIO.
Will update once I have the opportunity to test the KC7.