Thanks for all the responses on my question about a CD-34 control.
Sometimes the simplest answer is over looked.  It's not that I haven't heard
of a multi-tissue control block before, I just didn't think about it.  If
that was a snake, it would have bit me in the face.  I feel stupid, but it's
not the first time. (Probably won't be the last time either)  Have a great
day. Thanks again

Joe Nocito, B.S., HT(ASCP)QIHC
Histology Supervisor
Christus Santa Rosa Hospitals
San Antonio, Texas