That is the sweater I knit for my husband shortly after we got married in 2009. He has worn it 100+ times per year since then and it has taken some serious abuse-- this is the fourth or fifth time I've repaired it! I recently re-knit the collar, which was looking very bedraggled, and I noticed then that the sleeve near one of the cuffs had worn very thin, almost translucent, probably from dragging across his desk as he uses his mouse at work. I warned him not to wear it until I had a chance to reinforce the area, but he didn't listen, hence the hole. I'm now duplicate-stitching-- also known as Swiss darning-- over the entire area and I have built a small scaffolding of cotton twine to support the stitches I will make over the hole. This is slow, methodical work and I'm quite pleased by the results so far!
I'm also doing a bit of repair work to my last post-- I was not entirely pleased with my swatch photos and I did a re-shoot today with the help of my afore-mentioned husband! The things we do for love. This was also slow and methodical work, and I managed to learn a lot in the process in spite of my best efforts to ignore my husband's instruction. Anyway, I think these new photos will more clearly illustrate the differences between swatches as I make further progress in my Great K1P1 Quest-- more on that front soon!
P.S. Here's a great tutorial on different methods for mending knits!