Your story sounds SO much like me. I think of myself having been a decent advanced intermediate slalom skier in my day. But over recent years, I just have not been able to make it happen - and not because I wasnt trying. I would try 3-5 pulls on the slalom ski, then finally give in and take a second ski. By the time I got up on the two (I would pop right out of the water) I was so tired that I would have a pretty short kind of boring session. "Forgotten how to ski" is EXACTLY how I feel. Ever since I learned to slalom (when I was about 14), I pretty much hated skiing on two. As I research this, I do think that at 55 Im getting a bit old for it, but I have no intention of giving up.
I tried blaming it on under-powered boats. Well, that didnt work out. Tried behind a Malibu towboat, no luck. When I bought my boat last year, I removed all remaining excuses. An 18' boat with a 5.7L and 19P prop is hardly underpowered.
Then I thought it was just that I needed to adjust my deep water start technique a little... well that still might be the case, but I sure have tried a lot of things with no success.
Im hoping the wide/parabolic ski is the answer in combination with weight loss and some good conditioning. The Fly High looks interesting, but not sure I could get that mounted on my boat... cabin is a bit cramped as it is. However, I may try hooking onto a tower the next time Im behind a tow boat (surely sometime this summer).