Perhaps a momentary push-button near the left foot? As the old trucks. (Volvo / Scania)
(( I use Google's translation from Swedish to English. Is it readable? ))
Yes, it worked flawlessly! (Ja, det fungerade felfritt!) lol
My VNT vanes are connected to a lever on the dash so this would be easy for me to try,
thanks for pointing this out,
sounds like a fun experiment.
Did you ever try this? And do you have problems with your vanes sticking? Mine are jammed to 50% of travel in about 2 days and then i have to work the vanes by hand to loosen them up.