Nice work, and it's good to have the info on the /5 gauge bulbs.
Down the road I think an SM-1 would work as a flasher relay? This is the three spade Kisan flasher.
Current: 93 R100GS, 03 XR650R
Prior: 73 CB350, 77 R100/7, 83 R100RT, 04 XR650L
I love every motorcycle I've owned and even some that I haven't.