Hi Mike,
I was just looking at the GTM calendar today admiring your car and thought to myself, "it's been a while since I have been on the forum to see your car finished". So you can imagine my surprise to see pictures that look an awful lot like the last time I seen it. :-(
Any car can always be better. And as long as your wallet is open there will always be someone willing to help you make it so. Only you can say when it's good enough. I generally say "enough" a little after it stops being fun.