Welcome CTbeerworks, If you go to main AHA page and click community and then click find a home brew club you will find all the people you need to talk and answer your questions in your area. Also just by joining this forum you can get all the help and answers too.
I don't think the dunk sparge will work because of the temp. If your in the 148-157 your going to get more from your grains. At 168 your already past conversion temp and at the rinse temp. The squeezed method I've done and didn't see a problem but others might have.
They must of had a few problems. When I went back to review test it was cleared ended up having to take again. It looks like some test and quiz questions were getting interchanged? received a 15 happy with that.