I used Kiev 88 and it was extremelly good camera , lenses 80 mm and 250 mm were perfect. I shot my lifes greatest pictures with it. Now I am banging my head to the wall , why I sold it. My eye is on 60s and sexiest coolest cameras I have ever seen and miracle , they are cheap.
Thank you uploading the repair manual , I downloaded it and save in my account.
Keep using it and post your images. I will search for 6C also.