RL02 version of UNIX6?

There are actually plenty of builds out there that run on RL11s, e.g.: http://www.tuhs.org/Archive/PDP-11/Distributions/other/Tim_Shoppa_v6/ includes "A V6 RL02 bootable on a 11/23. Kernel is built for a 11/23, 2 RL02's, and 2 RX02's"; and my V6, running under Ersatz-11, is also an RL-based system. The real issue with mixing and matching kernels and disks is that since the RL was not a standard device (as far as 'mkconf' went), the RL's can have different major device numbers on different systems. This does not stop the system from _booting_, since internally there will be consistency, but consistency between the OS and file system is another matter: e.g. trying to mount another drive (or any other use of /dev/rl? or /dev/rrl?) may not work, since the device inodes for /dev/rl? might have the wrong major device numbers in them. Must be a slightly modified V6 - totally stock V6 will panic when it can't find a clock (unless there's a BDV11), or NXM when it tries to touch the switch register. And for machines with no BDV11, I had to turn the clock off while booting; the first time I tried to boot on a simulated 11/23, my totaly stock vanilla V6 apparently took a timer interrupt during the boot process and went wayyyy South, totally smashing the file system in the process. Not sure how the one above dealt with this... Noel