Looks interesting, who sells Shindiawa? Bet it is not at Home Depot.
The head I have on my John Deere straight arm is like that. Held up for two seasons now. Really fast and simple to load, and apparently pretty tough too.I found a head at the junkyard yesterday that takes 1/8 string...
You keep 6" chunks in your pocket and just push them in little holes in the head and it locks onto the string... It really looks tough and I'm going to give it a try...
Do you have to run the guard with the auto head? If Im remembering correctly Shindaiwa called their auto head the brain, and it was sensitive to rpm? It fed automatically and the guard kept the length in check.
It is a bump feed. I do not run a a guard.