Our 1997 Echo SRM-3100 is to the point where it requires service of some type almost every time we have to use it (only used on our 2 acres where our landscape architecture firm is located). The SRM-3100 still runs, and we would keep it for the heavy stuff and as backup, but I want a lighter trimmer (such as the SRM-230) for normal usage. I was looking at a SRM-230, SRM-266, or a T242 Shindaiwa. If anybody has experience with any of these models, such as pros and cons, any help would be greatly appreciated. Thanks.