I decided to have a better look at the gash in the rear tyre a bit more closely, I'd been watching it for the past week or two and only realised that the cut had made it through the tread and carcass and that the inner tube was actually showing! This was the main reason I decided to retire these tyres. As you can see in the pics above the cut made it through the tyre and the tyre liner. Must have been a big, nasty chunk of glass, rock or something.
Inside the tyre liner you can see all the black spots which were made by road grime getting through holes in the tyre... I only suffered one puncture whilst the liner was in place for the past few months. Most of the black patches haven't been penetrated through so the tyre liner actually prevented quite a few sharps from puncturing the inner tube.
I was hoping to reuse the tyre liners, the front one came out in one piece (with no black spots either) however the rear one ripped in two, you can see how many holes were in the tyres from the amount of black spots...
Now onto the hub, I'd had an intermittent problem with the pawls not quite catching on in middle gear, and I thought I might just tear it down anyway to have a look. Everything looked pretty good, the low gear pawl I replaced looked fine, all the pinions, shaft and gear ring teeth all looked good as well. However on closer inspection the driver pawls were chipped on the edges.
The corresponding dogs on the inside of the gear ring were also worn which you can see above; I may have missed this when I was building it originally and I bet this is what caused the slipping problem in middle gear as all the drive is going through these pawls. Ah well, I did get the hub for really cheap and it looks like it was quite well used when I got it. I've ordered a new gear ring and complete driver assembly, for some reason you can't get the driver pawls separately, they are different from all the other pawls as well. That's all for now until I get the parts in the mail, until then the Superbe is temporarily off the road and I'll have to ride Mr Ramen to work instead.