I have moved this thread up as it may be of interest to Bozak users. I bought a Bozak CMA 10DL from Morten. It is the best one with Alps black velvet pots rather than AB used in the earlier ones. Some knob caps from Mario G and a new headphone jack and of course three homemade phono cards and its all good.
I have had built first prototype board today to the original schematics. The components are nothing special although some are more modern so might effect tonal issues. Anyway I have no original cards to compare so I have no A/B and come to think of it if I had bozak cards then I wouldn't be building them. I have problem on one channel at moment but the design does function. Give me a few more weeks and these will be through the lab and we should be able to give some specs and opinions on the sound compared to some good hi fi and thew odd DJ mixer preamps we can find lurking about I haven't heard the project phono stages sold with this so I should try them too. Anyway just to say it CAN be done and watch this space.
Now have a headache from all that thinking!