My shindaiwa eb630 blew up on me today. I took it apart and one of the rings apparently got caught in the intake side of the cylinder. it made a nice slice in the pistion skirt, and spewed metal chunks all over inside. The piston is lose on the connecting rod as well. My question is, how much would it cost in parts to rebuild? Assuming I need everything but a crank and a head? It is worth it or do I go find another one somewhere for sale? This one must have had about a million hours on it! R.I.P.