I found a Mountainsmith Ghost on close out at a local sporting goods store for $70. The V8 fits, I'm up to five holders (I'll try to squeeze in a 6th) and room for two more lenses mounted on boards as well as dark cloth, filter kit, lens cleaning kit, loupe, meter and lunch (although I'd likely never carry all this stuff on trail---I'm just exploring how much the pack will hold. Of course loaded it's no longer an ultralight, I'm afraid!)