The Supershape Magnums in Canada come with the pre-drilled speed plate. You will not need a jig.
On the plate under the bindings the sets of holes are marked with ranges of boot sole sizes - ex. 300-320, etc... You simply pick the matching set of holes to your boot sole size and mount the binding accordingly.
With the Free Flex 14 Pro there is a setting on the free flex portion of the binding where you set it to the centimeter length of the boot. You would ideally set it to 33. If it is already set at 32 then do not worry. however if at 31 or less or 34 or more you will have to remount. Pick the set of holes on the plate that match 330 mm and mount the bindings with the free flex adjustment set to 33 cm.
With the older Free Flex bindings there was not a free flex centimeter adjustment so just pick the set of holes on the plate that matches to 326 mm.
Once the bindings are mounted then lift the tab on the back of the heel binding and move the heel back or forward to the appropriate location and put the tab down to lock. Test the boot by stepping it into the binding. The tab has a series of hash marks on it and with the boot sole in place the back of the binding should fall within the hash marks to indicate the correct setting. If at the front of the hatch marks or behind the back of the hash marks is either too tight or too loose so you will have to adjust accordingly.
Would be a really good idea to have a certified Tyrolia binding tech take a look at the bindings or make the adjustment.
Magnums are nice skis. These were my ski of choice for my last two pairs.