I was looking at some new saws today for homeowner use. Not pros ok. Like the Husky 55, 350, 141. Troy-bilt, Poulan ,295, 260. Echo. Homelite. Just wondered if all new saws are using the plastic center cases? I came home and looked at my older poulans 3750 and 2000 and the have magnesium center cases. Will these new plastic center cases hold up I wonder. Whats other makes using for the center cases?