Re: Need adivice for a new slalom ski
A 64" ski for 30 mph is the correct size for a skier weighing approx. 120 lbs.
If you know the brand and model of the ski you have skied on the most, that is helpful as a point of reference.
Double boots hold you rear foot in position more securely and can help with control. There are pro-level skiers who use a rear toe strap so it is really a personal preference, and not a requirement to advance in your skills.
A guy named Andy Mapple for one:
Most double boots are tighter and a taller design that makes them more difficult to put on - a consideration if you don't have a ski platform at the back of your boat to stand on. I don't know of anyone with a correct-fitting double boot that can put their ski on in deep water. It usually requires some sort of binding lubricant and a level place to stand while putting on the ski.
You can be creative and make it work. Some boats have enough floor space so you can put your ski on in the boat, sit on the edge and swing you ski over. An outboard boat I owned for a number of years had enough space on a rear deck that I could spread out a towel and stand holding the pylon...then fall off the back of the boat into the water.