I saved a pair of 1990s Lange X Zero 9 shells in very good condition last year with a Scarpa-branded Intuition wrap liner. They were $60 on ebay, Mondo 29 and went into the 11-11.5 Lange shell very snugly. First cook (at a reputable local shop) got me skiing, but the forefoot and toe box were still pretty jammed. I'm actually a 12A foot but liked to ski the Langes a little small for responsiveness.
I did a second cook at home after two or three days on snow, talking to the ebay seller, and reading up on it here. Cotton balls between my toes, very thin sock, Intuition toe cap, footbed, and a medium-weight ski sock. I built a little boot-remover device for the parking lot at the end of the day (see photo); a piece of plywood with old Tyrolia latch-in bindings. Put the boot in the binding, spread the Intuition flaps firmly, put the other foot on the device behind the heel unit, and pull the foot right out; yoink! I got the liners hot, stuffed them into the shells (also warmed to touch), put the foot package in, buckled up, and hooked the front of the device over a chair rung to put gravity pressure on the heel pocket (that's what the seller said was the key; aggressively pushing the heel back into the pocket) and read a magazine article or two on a 15-minute timer.
Took them to Squaw with just the thin sock, and they were perfect. My foot plugs in like foot and boot were made for each other, and I hardly have to cinch the foot buckles beyond mere snap-over. The toe box is still snug, but much better than the first cook. They seem to stiffen the boot somewhat, and one bonus is that it's easy to get the ankle buckles tight enough now (I always had to move the buckle rail on the third buckle to tighten the cuff up for my skinny ankles). With a 1-1/2" secondary power strap, they're probably 130+ flex. With the wimpy stock strap, maybe 120. The higher, softer liner cuff is much easier on my shins than the stock liner ever was.
The only pain I had after the second cook was at Mt. Bachelor in April, taking one last run on Thunderbird in heavy, sticky spring slush. The forces being slammed into my feet were just too much. A week later at Squaw, in January conditions, they were blissful again. Lesson: don't try to blitz that last run on spring garbage.
One more modification note: the Langes had plastic lateral stiffeners sewn to the stock liner. To keep the shell design as close as possible to the original, I cut the stitches out and glued and taped (grip or gaffer's tape–like duct tape but much less messy adhesive and removable) the stiffeners to the shell. Hard to describe but worked well. It also made the forward-lean spoiler optional if I want to experiment with a more modern stance. A little silicone spray on the tape lets the liners slip in and out easily. The stiffeners are the black and red plastic stuff in the photo.
So, even though I'm planning to buy K2 boots this year (the Langes are pushing 20 years old, after all, and I got a SUPERB cold fit in a Pinnacle 110), I'll probably keep the Langes for race days or whatever.
I highly recommend the Intuitions if you're trying to breathe a second wind into worthy old shells with packed-out liners. Take your time to get it right and you won't be sorry.