I reckon it works!
My last tank is the best ever, first time it hit 5xx as well..
All I've realistically done in the last few tanks is back off on the throttle on my pulses a bit (I used to go 'full throttle'), removed the intake path to the bonnet, and removed mud guards.
I was fairly careful (but do know I wasn't all the time), to keep vacuum around 5in, and make sure O2 bar was pulsing fast when trying to "Pulse". WIth my glide being the usual glide down to below speed and pulse back up.
Something i've noticed is that in closed loop power builds faster, ECU must be doing something, or it's the EGR ? (another thought).
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