Having also kind same problem:
www.seabreeze.com.au/forums/Kitesurfing/Newbies-Tips-Tricks/First-time-oversheeted-kite-bit-confused-noob/It's very hard to get to stock tuning with kites that have different front/back lines lengths. But i found my way. No stock but it get me what i want.
just get out in kind ideal conditions when you want to fly that kite, set depower to full power, and sheet fully in, from edge of wind window.
now, somebody likes that kite in this setup do a bit of back stall, somebody does not like but it's easy to tune it. i found i like to tune by bandit 7 that in this configuration do bit back stall, that gives me such enormous range.
if you like back stall and want it more, you need to make rear lines shorter. if you want to get rid of back stall you need longer lines.
