Rails is on the money....
timing being the most important factor
If u are proficient at backrolls and sliding transitions then put the two together and keep practicing with the timing of re-directing the kite...
Another crucial point is hand position on the bar,,,,it is important to have both hands at the centre of the bar
Unless of course u want to throw in a loop with the back hand and a grab with ur free hand,,,,then it's not that important