I'll have to look at that later, time pressures before work don't allow me to study that properly. However it sounds like it should be a good ride, and without looking at the route even I'm curious about doing it myself. Over multiple days, of course!
I tried putting new bar tape on recently, only my second ever time, and didn't manage to tuck enough of the tape in for the plug to hold it. I tried I guess!
Absolutely ideal with that cycle shop, and you have reminded me that I recommend Llyn Cycles in Pwllheli. Part cycle shop, part toy shop (if it makes it work in the modern era, then fair enough!) but the guy in there happily sorted out the air in my tyres. Somehow they'd lost air after not being used for 2 weeks, but he sorted it for me without issue and happily chatted away. I was more than happy to pay £12.95 for a portable pump with the valve type I required, and I would absolutely go back there when I next visit the area. Which will probably be on a 197 in the next couple of years!