Bump.
The 20V single solenoid bolts onto the P11/SR16VE head, and apparently clears the firewall in an RWD configuration. Not sure if when using the head on a DE(T) block one would still need the oil feed line, but if not, it would eliminate the need for relocating the twin solenoids.
The single solenoid can only switch both cams at the same time, but most people seem to configure their twin solenoids to do the same anyway.
If one obtains the P12/X-Trail motor, they are all set.
P11/16VE solenoids.
20V.