I agree with Duggan that a full-length tube would be preferable, and I've seen what appears to me to be some fantastic machining by carriercomp and socomguy. The only reason that I am settling for a +2 tube is because I'm just not comfortable taking a heating gun to my receiver, and a +2 tube will accomplish exactly the same thing without the hassle. For me, that's good enough. For others, it's not and I respect that. To each his own.