Originally Posted by mountainsport500
The reason I want a 72 mm wide ski is to accommodate a limited range of motion in my knees. I have severe duck feet which prevents me from angulating the inner knee in a turn and results in an A-frame stance. This stance of course severely limits my skiing ability. I will be skiing on the Fischer plug boot that I estimate will provide about 5 degrees abduction for each foot. After buying a 72 cm ski, I plan to mount my bindings in an abducted stance providing an additional four degrees each foot. That amount of additional abduction would not be possible with conventional width slalom skis without booting out.
I race masters and already have Fischer race stock slalom skis in a 155. This is the typical length for most master's racers.
I don't think 1 cm less length in the Mach 3 Power is an issue.
I have seen several good skiers lay down fast race times with non-race skis in both GS and slalom. Both the Magnum and Mach 3 Power are relatively stiff and have appropriate sidecut. They should both go pretty well given a good skier.
I am betting that my skiing improves with the abducted stance more than the slightly wider and softer ski slows me down. Of course this is very experimental and may not work at all in which case I will just go back to conventional race skis.
I am stretching trying to get more range of motion but several physical therapists have told me not to expect much improvement.
Please keep the insights coming.
Neither ski will work without serious modification to the mount point and lifters. The Nordica (XBS system) is completely out of the question because you can't change the mount (integrated system). With the Magnum you might be able to get away with moving the factory installed plate or mounting a new plate in an abducted stance too allow for your condition. You won't however be able to use the factory installed plate because the holes will be too close to each other. At your size and weight, you need a 165 - don't consider anything shorter. Remember that most sub-165cm race skis these days are intended for women and lighter (younger) male junior racers.
How big are your boots? This is going to effect how much you can offset your mount. Also, if you are going to offset a plate and a binding in order to get the required amount of abduction you will need a ski that can be redrilled/remounted and a plate that is not predrilled.
Personally I would recommend a slalom ski that comes flat and a plate that does not come predrilled. The first option that comes to mind is a 165cm Volkl Racetiger SL with some variant of a VIST plate installed (abducted) and then a binding that you can easily offset BUT will keep the toe and heel in line with each other (like a Tyrolia FF17, Atomic 1018, etc) - basically bindings that have a toe and heel that are attached to each other. VIST plates will be good because you'll be mounting into metal, and you will be able to go right to the edge of the plate without fear of the compromising the integrity of the mount.