IMO the older ASP's and Magnums were good. But I have had a bit of a prolem with a Magnum .30. The carb barrel was overly hardened and the throttle lever screw threads on the barrel broke off too easily. Not the same quality as my ASP .91 and 1.2.

In the past the Fox engines have had periods of low quality, but that doesn't seem a problem now. I would seriously look at their .15. Keep in mind though it will need all castor fuel.