...I know I've been in your shop with both of us checking the ski bottoms....
And I categorically and emphatically insist that those were the only bottoms we were checking out!!! No Lange calenders on my basement wall!

Phew! Marital crisis avoided......
Gary -- those P-8s never had a problem with warped bases. They were just kinda chewed up from that bump clinic of yours -- scratches, knarly edges. The stone grind made 'em look like brand new again. The shop did a great job. Beautiful structure, too. They are running sweet now.
But, this thread is kinda drifting away from the Peak 84.....Sorry John.
I was actually hoping to find an inexpensive pair of used iM78s in Banff or Calgary to leave at my sister-in-law's house there, so that I could use them at Louise and Sunshine instead of rentals when I'm out there on business.. But those skis are almost impossible to find used, so no luck. Oh well, I now have the Mach 3's there instead, and am very happy with those.
Let us know how the Peak 84 performs. If Head is back on track with bringing the Peak series back to where they were, or better, then that is good news. All the reviews I have read about this past year's Peaks with the FLR tip have said they are pretty lame. All energy, life and spark taken out. Shame.....