Steven and IanSki:
I'm a blown-out knee survivor, so if you don't mind, as with Sugahloafo, I’ll add my opinion and experiences.
It’s only been about 7 months since your injuries and surgery. Just my comment that you really should have instructions from your doctor and physical therapist (not from us folks on the internet) about resuming skiing and also the specific exercises that will aid rehabilitation. If you haven't been instructed, book an hour and get it. What's the cost? .... Maybe a bit more than a day's lift ticket?
Anyway, take it real easy on the slopes. Consider setting your bindings at almost beginner level ... and ski conservatively to match. Your knee likely will be very easy to re-injure again until more time has passed. My take is that there's less chance of being seriously injured by a pre-release fall than severe damage to the knee again if you don't come out of the binding easy enough. A second injury may not be as fixable as your first and recovery may be longer.
Good info from Sugahloafo a way's back. I'll add my story. Also about 1980, while powering hard during a turn in the moguls, I damaged my knee badly. I heard/felt a definite pop. I didn't fall when this occurred and I remained on my feet. After the initial pain and shock subsided a bit. I skied on one leg to the bottom and hobbled into the Tahoe-Truckee Hospital adjunct clinic located at the bottom of the lifts at Squaw Valley.
Surgery a few days later revealed that I had ruptured both my ac and medial collateral ligaments. And I even managed to stretch the other two knee ligaments almost to the point of tearing. Fortunately, my miniscus was not damaged.
Later I learned that the probable cause of the mishap was due to my heavy weight workouts for the quads only. Seemed reasonable at the time. After all, its the quads that burn during skiing, so get them strong. But the concept was wrong since I had ignored the ham-strings. I seem to recall that also about this time, pro and college football trainers were becoming concerned about an increase in blown-out knees. Game films sometimes would show player's knees buckling/giving out in situations of abrupt change of direction but with no contact with other players. What was happening is that the weight room emphasis was on the quads. It was assumed that normal running would take care of the hamstring strength -- which actually it didn't. The muscle strength imbalance of strong quads/weak hams caused the knee joint to become unstable in certain stress/flex situations. The knee essentially could self destruct on its own. I'm sure that's what happened to me.
The same surgeon that fixed Oakland Raiders' knees operated on mine. Following was a long year of rehabilitation. But the effort paid off. It’s still working despite 30 years of almost daily exercise -- tennis, jogging, hiking, skiing, bicycling etc. During the physical therapy period, the doctor and the trainers hammered repeatedly that quad exercises were forbidden totally, except for straight leg quad tightening isometric lifts. I could work out the hamstrings as much and as hard as I wanted.
My knee has never been quite the same since the injury and surgery. But as above, it has served me fine. Other than an occasional mild sprain, or some water on the knee, I haven't re-injured it. At the gym, for every quad extension extension exercise, I do two for the hamstrings. Bicycling and eliptical machines provide a balance to both. Although I still ski aggressively and am expert level (however not as much so as when I was a bit younger), I have always set my bindings for intermediate level. Pre-release only occurs in the moguls if I've gotten off balance or caught an edge. When I'm skiing well, pre-release only rarely happens. I would much prefer to find myself without a ski, than having to deal with an injured knee again.
Opposing muscle balance for all portions of the body is now known to be critically important to minimize the chance of injury during athletic activity.