1998 Audi A4 Blue smoke

I bought a -98 Audi A4 B5 with a 1.6L engine that has problems burning oil.

What I have done:
Cleaned the Head
Replaced the valve stem seals
Cleaned the valves and used a grinding compound to smooth up the valves and the seats
Replaced the head gasket
Controlled that the timing was as good as can be
Pressure test, the head - Good results, no leaks
Compression test, cylinders - Good and more the less even results.
Pressure test, cylinders - Good results, no leaks

I'm having a hard time finding the oil leak.
I have been considering the PCV valve, but it really burns a lot of oil and I haven't seen
a car have a that big leak from the PCV before.

Any ideas?
Thank you.