Back on the build in question ;-)
I sewed in a little bit of wood at the bottom of my Barley to prevent it slumping over my front light. Works a treat.
I've also got a replacement dynamo rear light (sadly my attempts to solder up a new capacitor on the last one failed, the circuit board was too fiddly).
Sheltering from the rain in a dark tunnel off the Roseburn last night, I was amazed at how favourably it compares with everyone else's battery lights - much better IMO (and I have an RSP Astrum and Smart 2x 0.5W to compare with).
Chainguard not so good though. I picked up a Hebie Chainglider to see how I liked it, but I think my chainring/sprocket combo is significantly too wide, leading to uber friction. I'm going to see if I can't file the chainguard down, since it's soft plastic, but it's significantly out of spec (4.5mm > 3.0mm max).