[crummasel]

Henry,
if the cracks shown on your photo were caused by pulling the guide towards the spring side it would prove what i said. But more likely it shows a cracked lower guide bore area caused by an oversized seizing guide being pushed in from the spring side (maybe also with wrong methods), so not an example for a removal of a guide towards the seat side.
However, i fully agreed to your methode, just a small comment to it (by the way with the same intention as yours to make DIY - builders more successful) so no reason to shout. ;-)
I will not comment any more, seems we do not have as much experience on Porsches in Germany as you have in CA. ;-)