I'm going to be redoing my helm dash this winter and some of my gauges are outdated/not needed. I'm mounting a 2008 150 optimax and have the Smartcraft square gauge (tach/fuel/engine hrs/ect). I'm trying to decide on what gauges are necessary and which would be beneficial. I'm getting rid of the large speedo (I use my HDS8 for speed) The 2" smartcraft gauge is kinda small. Thoughts? what would be on your "must have" gauge list?