In terms of the hog teeth preps Dr. Gregg did guess correctly which erbium prepared the teeth and I think Dr. van As did as well. Of course one out of two is pretty good odds!!!!!!!
The preps were purposely done with the most comparable settings I could achieve although there are differences in handpieces, tips and another factor which is a major difference between the two erbs. Here are the settings and tips used for the preps:
20 Hz, 300 mJoules, 600 um tips at the distal(one of the tips is tapered from 750 to 600 um)
Al