PDP11/23+ frustration

Hi folks, today I have powered up my Ampex DFR 996 removable/fixed combined disk drive. After tweaking a bit around the address plug (btw does anybody have an original one?) I got it to start. It said to be ready only once. And made a horrible sound with the head of the removable disk. After that I tried it again but the drive just inserts the head for a short moment (with the same noise) and retracts immediately, shutting down. Are there any opinions, spares, help, TOOLS for my situation? I have no clue if I could be able to find a new pair of heads and install them? Who has experience? What about the head alignment procedure? Now I have no software for my machine. No boot floppy disk. No way to conveniently boot the PDP11. Nothing. What to do next? I could start to program the machine via the monitor, like my Honeywell or a PDP8. But I wanted to run an operation system, use harddisk and floppy etc. The harddisk is VERY heavy (80kg?). Was much work to get it here... Has anybody a replacement? Is anyone interested in taking my whole system? Regards, Philipp