I have been so enamoured with Lizard Ridge, that I haven't even mentioned that I finished the Trekking toe-up socks some time ago. No picture yet as I have already worn the socks and they are sitting in my laundry basket awaiting washing.
I've decided that I definitely like the toe-up technique as they make a much neater toe, are easier to fit and somehow even the heels work better. The downside was working out how to cast-off the top part of the sock without ending up with something too tight to even pull over the foot. Even casting off with a (much) larger needle didn't seem to help. I found the solution on the Internet (and will add a link if I ever find it again...) So I'm not claiming this as a personal discovery but do want to share it with any other knitters who are having the problem.
Top-of socks stretchy cast-off
Knit 2 stitches together. Loosen up the resulting stitch (I found I got the right amount by stretching out the ribs). Slip the loosened stitch back onto the left needle. Knit it and the next stitch together. Loosen up the resulting stitch. Repeat until one stitch is left and slip the yarn through the final loop.
The trick is to ensure that the loops are loose enough.
Once I finish Lizard Ridge (or run out of Noro yarn - whichever comes first) I shall return to knitting another pair of socks. The reality is that although I can buy quality socks much more cheaply in the stores, I genuinely do prefer to wear the ones I've knitted myself.