It's been a bit rough over the last year and many of my projects have been placed on hold, but I've been able to keep my head above water with at least one. Professor, this one's for you!
The first three pics are of my first Falbino/PFA backcross attempt. The Falbino spores were germinated in LC containing some of the PF Albino monokaryon culture used to create Falbino. Most of the fruiting was done during a long power outage and was somewhat neglected so this isn't my best work

, but it will suffice for now.
There seems to be not only a difference in color but in size and shape as well. I've added a pic of Falbino generation 2 (the fourth pic) as a comparison. Both were grown together.
Hopefully with more work some more of the pigment can be removed but it's still too early to tell. These fruits look very much like the very first Falbino that was produced during the F+/PFA cross.
http://forums.mycotopia.net/showthread.php?t=8747 (PF Albino from Sporeworks (tribute))
Generation 2 was of course grown from the spores of that cross so I'm a bit worried the same may happen again and the original substrain may again mingle with all the others.
Don't get me wrong! I love Falbino and it serves its purpose with an array of fruiting substrains that can be duplicated through cloning....but this experiment is the quest for the all white cubensis. One that stands up straight and drops heavy spore deposits. At first I was skeptical and maybe a little still, but backcrossing seems to show some promise.