I have been working in the field of pathology for more than 28 years. Several of those years were spent in experimental histology research solving unique problems. When I first started Mohs surgery 17 years ago  I was frustrated with the difficulty that I was having getting proper results without wasting tissue. I had to call upon my experience as a machinist and my early years of mechanical engineering to come up with what is, an elegant and very successful solution to a huge problem.