Understandably a pain in the butt and Very expensive, not being able to demo - I was lucky enough to demo the 12,10 & 8m.
Get yourself a 60cm bar - it will help a little with the turn speed. I use one on the 8m. Their Foil kites, not inflatables so they turn slower and anything that helps speed them up is a good thing, unless your a grandad armchair kiter..
Whatever bar you get, try to get one that does NOT jam the depower line - when turning hard. Some PU lines do this as the centre hole is not big enough, the result is that you lose some smooth steering ability. Some Pro foil kite racers hate them.
In the mean time, basic bar trimming will fix your problem. You need about 18 knots at least !!!
How I do it - because it doesn't behave like a real race foil.
Stand on the beach with the kite at 12 overhead.
Pull the depower (or) let it out, with bar full down - to see how far behind you, it will fly.
Let the Depower out until you get it to "slowly" backstall to about 1130-12 at bar full down.
It wont choke out the kite completely - it makes it stay in the power zone rather than the edge.
Now before you throw yourself in the drink - forget your board, walk out to some waist deep water in a safe spot.
Practise LOOPING your kite
1. In both directions
2. At different heights around the window
3. Count your timing
Until you are fully competent at your FOIL kite turn speed and looping control.
Grab your board - play with your timing..
Rip it Up
Pics or it didnt happen

The Heli loops will happen in no time when you get the above saughted