WHAT ASPECT OF THE PROBLEM WAS MOST DIFFICULT?
Trying to achieve personal goal of diffraction limited performance.  
(I was not able to achieve this goal).

WHAT INSIGHTS (IF ANY) DID YOU GAIN FROM WORKING ON THE PROBLEM?
Certainly the benefit of the glass-air interface.  The problem helped 
to creatively think about different possible solutions to the problem.  
Stop location, glass combinations, and bending took on a new form 
during the design process.

ADDITIONAL COMMENTS:
I was very pleased to have the opportunity to participate in this contest.  
I look forward to more challenges in my career..