Um,, I'm pretty sure I've read somewhere, not sure where, perharps the
Dann bio, that two guitars were used on Pink One, one being a nylon string classical. In fact you can hear the differences... I'm fairly certain that Things Behind the Sun and Road are recorded on a Nylon string guitar.
If this is so, and disregarding Know and Horn, there are Nine songs recorded over two two hour sessions. so consider the following scenario
First session: Things Behind Sun -Standard Tuning on a Nylon string guitar; Road--- just drop the g string down to e, play on the same nylon string guitar; then switch to second guitar pretuned and ready to play in CGCFCE, play Pink Moon, Which Will, and Parasite. Drop high C string to G, play Place to Be. End of first session.
Second Session: Tune to BEBEBE, play Harvest Breed and From the Morning, tune down to AAdEBE play Free Ride.
notice in doing this you are always tuning Down, which is easier than tuning UP