Have a metal blade one MF - it really wasn't that thick; which goes to show how little top end guts they have. I could have smashed through it with a 25cc 2 stroke, and this is a 26cc 4 stroke.
They made them in the late 90s and early 00's - 30cc 4 stroke pushrod OHV engine with wet sump - only takes 100ml of oil
Ryobi still sell 4 stroke trimmers in the USA - but OHC timing belt driven. AVB has mentioned how useless the oiling systems are on them
I still can never get over my old TG25 kawasaki (1980s model ex council) every time I use it - really powerful and so light (which is important to me due to an issue in my arms causing me grief)
