Had a small electric for years, decided to upgrade to a gas (Craftsman 2 cycle curve shaft) and I'm going crazy! 1. It says it's a dual line and the spool has 2 eyelits but only one a 1-channel spool! Can I thread 2 lines into one spool? 2. Each bump puts a mini crop-circle in my lawn, are you supposed to bump on the concrete or stone??? 3, Line keeps jamming and snapping off, or snapping off if I touch anything hard (woor or stone pavers, edging, etc.) I am using 20 feet each use, and have 1-inch pieces of string all over the yard! 4. I'd like to use it as an edger (like the pro landscapers do) but the line keeps snapping and I have to shut down and open the spool to re-thread. 5. After unjamming, sometimes the line wraps around the shaft in a knot instead of clipping off on the shield's blade. All of this may just be me needing to learn proper use, but it's been a few months and I'm getting very frustrated. Any "trimmer for dummies" links? By the way, I saw a recommendation for a product called "edgeit" but they are out of stock for the season! Any alternatetives for that??? Thanks, sorry for the long first-post!