Dowmer,
My personnel experience with HK has not been a pleasant one,so I'm not too keen on them that's just me mind you.I know it's hit or miss with their engines and I'm just not willing to take a chance on getting a bad one.I've read the HK engines have had rear bearing problems. On the other hand Octopusrc has good reviews and no reported rear bearing problems,you can get an upgraded set of mufflers that don't leak for $9.69,a upgraded rcexcel ignition for $14.94,so with upgrades the engine is $390.00 $40.00 for express shipping(6days) add 2 Bowmen rings for $14.00ea and she should be good to go.