I have two stihl trimmers and the plastic 'bump and feed' spool wears out every two weeks. Once the plastic wears down to expose the ribs, dirt gets in and makes it harder to feed line and the vibs are nasty. I have the ability to make the whole entire assembly out of aluminum at my fathers shop. What do you guys think about that? Waste of time and money or would it be impressive to see something like that in action? I also could copy what Redmax does with a metal insert but thats too easy!