This gets into a whole different topic
. Dru mentioned the same things about the V1 vs V2 in a conversation we had. Using them side by side, I get why he says that. Part of my theory there is that he uses a brush so much that they "break in" relatively fast compared to what others will feel out their own brushes. In a production environment, springs are generally not stress relieved after winding, so will soften over time as the stress is relieved. The more you use it, the faster the softening will occur
. In regard to the lube, yeah, tolerances within a brush are not such that something like a light machine oil will be of any use as a lube. Certainly not needed, and really offers zero benefit. I feel differently about a lube that will stay where you put it, or offers an actual benefit to moving parts, or seals. Again, not really needed, though...
Just as a side note... the work I have done with my HP series of brushes, the parts that I made, springs, etc, makes them as soft, or softer to use than a Micron. Super smooth.