Hey Paul, i turned on my phone and I had 3 voicemails from you... Im sorry I had to turn my phone off, i was out of minutes for the month!
Let me know about the knock sensors, and if you got them taken care of.....
I think you might be up for the guides, its not as bad as you think... I *almost* think i could tackle it, as to me the hardest part is getting the crank off, and then making sure you secure the chains before you pull the guides... it doesnt look bad at all, after doing all that stuff I think you might be able to do it.....
I dont konw of anything there, but I might look for some sort of GOOD independent shop.. Or, a nissan dealer.. The older nissans had issues with the guides as well, and with a FSM they'd be able to tackle it...