Hi, I just bought this machine 3 days ago to replace my small echo trimmer that is getting repaired at the dealer. When I bought the 100rx the guy at the shop told me i could put on the head gearbox attachment on it , thats part of the reason why i bought it. But when looking on the sthil website they say the 100rx is not approved for use with the attachments. I was wondering if any of you guys use the 100rx with attachment and how well it performs. Thanks in advance, My english is not perfect , french is my first language , I am from quebec canada.