Caleb Madison's "Put the Gun Down" is 4.5/5 in difficulty. It is 19x18 squares, which is between a standard and Sunday-sized grid. Enjoy it!
Just a quick announcement that the AVCX can now be solved using Puzzazz, which is a fantastic free app for iPhone or iPad (and soon Android and Windows 8 also). Puzzazz uses a nifty handwriting recognition technology and is very amenable to puzzles with special gimmicks. To solve in Puzzazz, just open our weekly email on your iPad or iPhone (in Safari or a Mail app) and tap on the .puz attachment to open it.
If there are other platforms on which you would like the AVCX to be solvable, just let us know!