i have 4 stihl blower 2 550 and 2 600. i have Have 1 600 for a year and the other for 3 months i have had the top handle brake off one. all of the blowers have crackers in the middle of the top handle. today i dropped the blower 2 feet in the trailer, and the corner of the backing plate broke. now the right strap falls out of the grove that it hocks in to. i have one echo 651 for 3 years never had any problem with any thing breaking. the echo has a tub like plastic backing plate. stihl has a hard plastic. i like the power, comfort,and quite 600 but if i spend $40 to 50 for each blower. that adds up quick. has any one else had the problems?