What has proven to be the better product? Does the Stihl Auto Feed head let too much line out, or does it work well? I was going to buy another bump feed so went to a new dealer and he said the bump feed is home owner compared to how good the auto feed is, they cost $75 in my currency. Cost doesn't matter if the product is good. I haven't seen the Shindaiwa Speed Feed, or spoken to the dealer about them. So, keen to hear comments about both. BTW, I'll be running the one I choose on my Honda trimmer, just get the arbor to suit.