You've got that right. I think 6Y9 may be the hardest I've flown into as well. I really need to look at the IAS vs. CAS for that plane... I was climbing out of ground effect slightly below the white arc!
But, I wasn't yanking the yoke back or anything, and it wasn't too mushy so I knew I wouldn't stall. It also didn't behave like it was behind the power curve.
However, the technique I had to use if there was anyone else in the plane was to start with a combined short/soft technique (flaps 20, stop to increase power, get the nose off, climb into ground effect) to get off the ground and accelerate in ground effect basically to the end of the runway and at the bottom of, or slightly below, the white arc until above the trees. Level out, accelerate, climb more, accelerate more, flaps up.
While it worked OK (and I was careful to keep it a good couple hundred pounds under gross), part of the reason it made me nervous was that there's a fairly long portion of the takeoff where you're completely screwed if anything goes wrong. To successfully abort a takeoff, I'd have had to pull power before the ASI was alive, as it wasn't coming alive until I was off the ground in ground effect. From about 2/3 to 3/4 of the way down the runway, you have no options. You're too fast to abort successfully but there's nowhere else to go except the trees. From there, you're in the danger zone until you're high enough to at least glide to M-28, which would probably be at least 500 AGL.
I had one landing that was a little dicey too. I was actually a tad slow on the approach, but a little high. I pushed over to trade some altitude for airspeed and slipped a bit to keep from overdoing it, but somehow ended up with a fair amount of energy in the flare. Again, once something like that happens, you don't have too many options. By the time the plane told me it didn't want to quit flying, I don't know if I could have made a successful go-around - Those big barn door flaps don't retract very quickly (electric) and the plane does not like to climb at all when they're hanging all the way out. So, once I was committed to the landing I just had to ride it out. I probably touched the first time with 1200 feet or so remaining, but got kicked back up into ground effect. About 300 feet more until I touched down again. With hard braking and full aft elevator to try and improve traction, I was within a wingspan of the end of the runway before I came to a stop.