When you guys trim how do you keep the trimmer grass the same height (even) with the grass cut with the mower? I know when I trim, allot of the times its hard to keep from tilting the head a little bid and digging. Also when you are running it along a fence either metal or wood, how to you effectively get the grass down to height. You cant smack the grass between the pickets as you will destroy the wood over time? Any tips tricks or suggestions here? Chris Precision Landscaping!