I sand all day every day, 7 days a week, 8 hours a day sometimes nothing but orbital sanding.
My sanders work best on full speed(I do occasional change the sander speed), FULL VAC. I have not adjusted the CT suction speed on any wood project in the 8 years I have used them. I keep them on full for my epoxy coated mesh projects as well. I have two brand new CT 48, they stay at full suction and they work great with every Sander I have. I own an older CT 33, it has never been set on anything but full power(other than my initial test period years ago).
Ill never understand the guys that work with wood that say they get better results with lower suction. Isn't perfect , perfect? My vacs are on high power, I get perfect results, no swirls, no scratches just smooth and flat
When I first purchased the variable suction vacs I tested and tested and I either had no difference or better results using full power. I think I can search posts I made maybe 7 or 8 years ago where I say the same thing and I haven't changed since then.
I have an ETS 150, EC 150, Rotex 150, RAS 115, RAS 180 and Pro 5 and I have sold off EVERY other available in America sander Festool has made in the last 8 years, I have owned them all. One thing never changes, I never mess with my full power vac setting.
The older Fein vacs and some of the newer units have one speed, full bore and any one here with those Feins can tell you they are as good and some ways even better than the Festools CT's. They are not missing the variable suction, for raw wood projects especially. I maintain that variable suction is more for other things than raw wood.
For me the suction NEVER had anything to do with the sanders jumping, it was my my lack of experience with them. I would love someone to bring me a jumping sander because though I think there may be a few that are broken, I believe that for the most part it's the user.
There is zero break in for these sanders, its the user that gets broken in, not the sander.