Chainsaw Repair

I've used a chainsaw a few times on the shrubs myself. My wife gets disgusted with me and says that it harms the bushes.

I have four hedge trimmers and all are double sided. I went and got them all going this past week and did all the hedges and shrubs around the house.
Weed Eater 20" 21cc single action I've had this one since 1998
Echo 20" 21cc 1500 double action my favorite is a 2002 model
Stihl 20" 25cc H80 double action is the most powerful and cuts the biggest stems but weighs more too. I got it used a few years ago. Don't know the age.
Homelite Bandit 16" 16cc Bandit single action is more than 20 years old. My second one and it has had the blades replaced about 12 years ago.