I'm interested, as well, and it sounds like I'm a few weeks behind your re-rentry into 12ths scale racing. I raced a Corrally and a 12L about 10-13 years ago, as well, and strangely enough felt exactly the opposite from you. My Corrally was one of the most unpredictable, ill-handling car I have ever owned or driven. Compared to the 12L, it was a monster. I couldn't get the car to track straight, come off of any corner comfortably, or even fell the same from one race to the next. My 12Ls were almost "set it and forget it" kind of cars.
I hated the Corally, and couldn't sell it fast enough. I went from struggling to make C mains with the Corally to back in the upper half of the A main once I got a 12L.
I just bought a Carpet Knife, too, and hope to race it in the next few weeks, and I am looking forward to getting back into the game. Everything I have heard about these cars seems to point to them being 1 of the 2 cars to beat, and pretty much straightforward to set up and maintain. I haven't heard about any frailties with the car, either.
I'm interested in hearing some different viewpoints on the cars out there (and not, "this one rocks, the others suck").