Looks neat.
You could have done away with the inline (Twix) resistors by swapping your relay for one of these;
MOTORCYCLE LED INDICATOR RELAY FOR HONDA, KAWASAKI, YAMAHA - STOPS FAST FLASHING | eBay
It has the same effect of stopping the rapid flashing when switching to LED's as well as...
After a bit of research it seems all brake fluid is technically 'synthetic' or man-made rather than petroleum based.
Mixing silicone-based with glycol-based fluid is the thing to avoid - with consequences similar to mixing socks with sandals apparently!
I've decided to replace and relocate the rear brake fluid reservoir 'cos the original looks as ugly as sin IMHO :p
Question is, can I mix Dot4 synthetic with the existing fluid (if there's owt left of it by the time I've finished re-plumbing!) and what works best (read: cheap and effective)...