We have an Echo GT 225 Trimmer, Manual String Feed.. It's your Basic Trimmer and the String dislodges with little or no effort while Trimming.. We mainly just trim grass nothing heaver.. We find it a pain having to put a new piece of string in frequently.. Firstly I'm told to install an attachment to replace the string would be to hard on the Bearings.. Hence looking for a Trimming Unit strong enough to handle an Attachment , something just under the $500. range .. Thoughts & Opinions Appreciated, Cheers Thanks