Howdy experts, I just acquired a new (but last years) Shindaiwa T260B. Seems like a very well-made machine, and it may even have the 1.4 hp it claims, BUT - at anything above fast idle, it vibrates more than I expected, at full throttle a lot more. My only standard of comparison is the Homelite electric-start curved-shaft model I have been using, which did not viibrate enough to notice, whereas this Shin, which I expected to be a Cadillac, is leaving my hands tingling after a half-hour. Is this typical for this model? I tried the Speed-load head, and it is a little better, but even without any line in (to keep the head as balanced as possible), still lots o' vibe. I guess its a good thing Shin has that 7 day return policy, but I'm surprised given the reviews I have read here. Thanks for any insights.