I had this fail just recently as the front spring snapped on the same trip , had to have it recovered , I took mine to revolution Porsche Danny called me after investigation and told me my ignition switch was toast , I had the same symptoms as no resitence when turning key , I had to stall mine for it to shut off, , BUT on the facelift cars the switch is more expensive , luckily he managed to source a used GC part for me for £95 which saved me a fair bit ,
Well done though on doing it yourself , there's something quite satisfying doing a repair on your own , if it had been just the £20 electric bit on the ignition switch I'd have had a go myself