rcrunr's got a good idea. I started with the vg and everyone knows how good i am at tuning. It was really easy, and with that warrenty and price its perfect. I wore mine out when the pressure line popped off and it got too hot. I sent it in to o.s. and had a brand new one back in a couple weeks. The vg will work fine outdoor but most wouldnt recommend it, if you think you need more than go with the v-spec for outdoor, by then youll know at least how to handle it for indoor. Now you have a spare engine too. Works out great.