First, I must say this is one of the better topics I have read in a while.
Second, I use a Pentax spot meter and normally place the shadow values on Ziii and then develope accordingly.
Third, I always use medium format APX 100 and when I started exposing it at asa 64, my negs began to look much better than when exposed as asa 100.
Fourth, thanks to all for such a great place to learn and laugh.