Seagate hard drive for PDP-11/23+

Greetings, I love the dual RL02 drives on my PDP-11/23+. It's great fun to hear them spin up, and they are a neat conversation piece. However, I fear that ongoing operation will eventually lead to their demise (as with all things). I'd like to move to a (slightly) newer technology. My goal is to: 1. Purchase a Seagate ST-225 or ST-251 hard drive in working condition. 2. Build a cable and interface assembly as described at http://home.windstream.net/engdahl/rqdx3.htm, and put the drive in an external case/PSU. 3. Properly insert my RQDX3 (in my stock, but not in the machine) into the PDP, and connect to the drive. 4. Use the ZRQCH0 utility in XXDP (perhaps loaded from a TU58 emulator) to format the drive as a RD31 or RD32 (depending on the Seagate model). 5. Determine how to boot from RT-11, and perhaps TSX-Plus. Is this doable? Will the KDF11-BA built-in bootstrapper ROM boot from a RQDX3? Also, my RQDX3 card is assumed working, but untested. Is there any way to test the controller board functionality without having a drive attached? Thanks for any thoughts! - Earl