We all want to save money. I've been buying a lot of NON-OEM bump trimmer heads for my Stihl. I'm finding that the tabs on the inside of the main body (that screws to the trimmer) are getting broken off. I have tried many non-oems including Stens and an assortment of items off Amazon and Ali Express. They all seem pretty much the same. Seems they last only a few weeks. I'm a commercial/residential LCO and cut 5-days per week. 8-10 homes per day. DOES THIS SOUND ABOUT RIGHT to everyone? Also... DO THE STIHL OEM heads last any longer??? My suppliers (who are Stihl dealers) say theyre all the same.