Ken,
Sell your plane to someone else with the agreement that when he or she gets it running, you can buy it back for the same price.

The reason being is it sounds like you need to totally remove yourself from the problem. I'm sure there is nothing fundamentally wrong with your systems. These planes are reliable and do run well, someone else needs to get in and fix it.

Obviously it's not an engine problem, it's a setup problem. Let a fresh mind look at it at their leisure and the problem will be fixed.