I gave this a shot awhile back. If you look at the roll out chart (Mugen Seiki) you will see that 16/19 49/46 at 76mm is really close to 17/20 49/46 at 70mm. I measured actual droop of the car and reset it. In the front I was able to obtain the same droop, in the rear I came up 2mm short with the screws all the way up.
63mm Fronts, 70mm rears. On track performance; the car had more steering responce, lap times for this track stayed about the same. Some where around 15 mins of run time I noticed that the steering begain to fade and around 20 mins she was pushing like a frieght train. I had a ton of tires cut so I ran the car that race and it was fun. That was the end of scientific experiment #154879658.120347 . 70-71mm there lookin for a trash can...
MUGEN SEIKI NOVA ROSSI ENETTI TYRES HUDY PROFESSIONAL TOOLS
BYRONS FUEL AIRTRONICS RADIO EQUIPMENT PROTOFORM RACE BODIES
MUGEN RACING RC AMERICA AKA RACING NUGGETS RACING DESOTO RACING