I have the Echo Articulated Hedge trimmer attachment for my Split Boom power unit. A little on the heavy side with the heavy articulating gearbox, but I like it, and so does my Aunt and Uncle. Problem is, that power unit is what I use for my Edger attachment just about every day. I hate being without my edger! And they have a LOT of tall hedges and shrubs to prune. Now for my question.... They have a LESCO trimmer (the older Echo 23.6cc ones, only green) Since I mow for them they no longer have a need for it as a string timmer. They were wondering if they took the string trimmer gear box off, and just purchased a Hedge Clipper attachment, removed the short tube off that gearbox and just mounted the Hedge Clipper attachment gearbox right to the end of their string trimmer. Will it mount? Are all tubes the same diameter? Are all internal driveshafts the same size OD? They kinda want to make this.... Anyone try this, or know if it'll work? I don't want to see them spend close to $200 if it won't work.