For anyone whos looking for a way to practice take offs in between the real thing. This is my improvised indo board. Its a cheap skim board with a piece of ply screwed underneath to stiffen it up. The roller is a length of sewer pipe (the real thick stuff).
It works a treat for timing, strength, power, foot placement, then weight transfer between front and back foot. Gave me a lot of the instinctive stuff you need for steep takeoffs.
Be warned it is hard and you might want to just work on strength first. Do some push ups and burpies. You will probably crack your ankle on the back of the board ONCE whilst getting the hang of it. It is possible for the board to slip out under you and fall on your but. Hence the tight weave rug.
Hope someone gives it a go. It works.