I've been using Echo trimmers (225 & 2620) for a long time but recently got a couple of Stihl trimmers (FS91R & FS111RX). Tried the Sthil's but couldn't get use to them. I don't know if the angle of the head is different, or I'm just use to the echo speed feed head. Do all these trimmers has the same angles? Felt like I had to hold the stihl lower than the echo.