@Tom-D I think @Snowmass was implying that there are no potential squawks because everything is dealt with as experienced so the inspection goes fast. I didn't get the impression he was discussing progressive inspection.
Three weeks is a long time for a single engine Cessna, my 182 is generally a week and I figure 2-3 weeks for the 425, depending on which inspection is due.
I am not sure of the meaning of your reply. The plane as a whole is only inspected by an IA once year but I inspect it personally on a regular basis for problems and fix them as found with an A&P sign off. So is this really a progressive inspection? However, the result is by the time the plane gets to the IA little or nothing needs to be corrected which is nice.
Might as well be ! it still gets one sign off by a IA. still gets all the discrepancies corrected and never sees a long period of inactivity. The other way is what I call 13 month maintenance period. where all discrepancies are cared for, and modifications/upgrades are made.
3 weeks for my second annual. $6.8k. And I found the landing "knee" they replaced is firmly hitting the brake disk. So now I am waiting to see how they will fix it when its at my hangar and unfit to fly.