(I'm curious, how do you approach constructing these — do you handle it like a standard themeless, or do you start from a different place or use different techniques? Thanks!)
So, the first thing I do is try and come up with a word list / word bank. From there - I look at what the hardest letters to fit in will be (try to use all of them at least once), and look for a a good cross on the annoying letter. From there, brute force. I should probably get a program that I can enter word lists into, but.....