When I bought my TS-11 tape drive, the guy who delivered it let me know that he had an 11/34 for an attractive price.  So I bought it.  I haven't done much with it either (that's what happens when 4 PDP-11s show up in less than a month) other than use it to motivate me to re-organize the H960 racks that came with the 11/45.

It's been put into a rack of its own with 2 RK05 drives.  The RK-11 controller has yet to be installed into the 11/34.