fwiw - 300mm is my blue sky initial target (with obviously 100 and 200 intermediate targets) - dont ask me to justify it - apart from drill results. 300mm (~9-10c ?) is about 10x for heads but 20-50 for oppies if you got at 0.004 or less. 100x if you got in at 0.001 (was a few million available at this price on the ask a few months ago...)
hagw !!
cheers
MD
