I've done it.
I purged the keg with CO2. added the priming mixture, used a racking cane and CO2 to rack.I Filled the corny, gave it another squirt of CO2, fitted the lid, pressurised. then vented by the pressure release valve.
It tasted that good I've just had a half pint. I tastes wonderful now.
I hope it's ready in 14 days. This was my emergency brew 'cause I'm out.