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Kevin Rutherford Scan Gauge
Works as advertised, which is priceless on its own. Wanted it for checking against gauges and for things the gauges won't tell you.
Thermocouple
All parts were ordered, one part did not come with the rest, called, service was great, got all parts within that week
Turbo Boost Gauge
Have not installed yet
Haven’t been able to try it yet because I ordered to short of wires needed.
I think it helps, but it does not eliminate the flutter. It definitely doesn't hurt the performance of the gauge. I say go ahead and give it a try, but lower your expectations.