Hey Bentley.....they make a carbide tipped scoring tool for the backerboard that you score it a few times with and then snap it like drywall. Cutting that stuff with a skill saw is murder on the blade and the particulate dust is not exactly healthy to breath. The tool costs a few bucks and works with both standard cement board and the Hardi Backer board. I didn't run into the same troubles with the grout, because I also used the same travertine stone tile for the back splash in my bar. If you plan on doing any future tiling projects, bite the bullet and purchase a cheap wet saw at HD for around $80. Works like a dream and I was able to tile my entire home (4 baths, backsplash in kitchen, bar floor, etc., etc.) with one cheap wet saw. Just as long as it has a decent blade, your golden.
In response to your PM....I used a Love TSS2 temp. controller that has dual inputs and dual outputs. I have 2 temp. probes....one in the coffin and one in the keezer. Each channel controls a seprate outlet. One probe controls the temp. in the coffin, by powering the plugs that the fans plug into. The other probe controls the temp. in the keezer, by powering the plug that the compressor plugs into. The TSS2 was $73 and I love the fact that my coffin is controlled 100% independently of the keezer. Wasn't hard to wire at all and I can help you with programing if needed. Good luck.