I should know these but...
1) What is meant by "fast axis", "slow axis" as it pertains to diodes?
2) I asked Tim Walsh this weekend and he confimed that in theory, any scanner can be tuned perfectly with enough patience. I forgot to ask him, what pattern do you use if you know the scanners are only rated for 25k? I only have/know of the ILDA 12k and 30k patterns.