power steering pumps: A1 Cardone versus ZF

[200q 20v]

Several years ago I somehow got ZF rebuild pump for around $200
(current price is 400+). Unfortunately it only appears to have lasted
about 15 hours on the track, don't have exact records.

Haven't had any leaks until I started occasional redline visits in
preparation for a new season. After a short time hydraulic fluid
started dripping from the pump...

I got the cheapest pump I could get, A1 Carbone from Rock Auto. So far
found two big problems.

1. Black paint is everywhere, including hose connections and all four
threaded mounting holes. Brake cleaner somewhat helped.
2. Pump was primed by something that resembles Dexron ATF and not the
Pentosin CHF 11S.

Pictures uploaded to my picasa album.
https://picasaweb.google.com/a200q20v/PowerSteeringPump

Will see how it works on the car tomorrow.