I understand the desire not to be invisible to blind motorists approaching rapidly from behind, but I was semi-blinded by over-bright rear lights on one forum ride so I suggest that you can have too much of a good thing!
Super-bright rear lights used during the day could be handy though. The then-Brombtonfb had one on his bike and I could see it from over a mile away on a very sunny day. (He took a wrong turn ahead of me and I could see him disappearing into the distance. The light had a distinctive pseudo-random burst flashing pattern which was extremely eye-catching.)
As for my bike fettling today... very minor, but hopefully it will put an end to something that has been annoying me for months. The rubber hoods on my singlespeed bike kept loosening and bunching up under my hands. I had stripped the gear-changing parts out of some old Campagnolo Ergopower brake/shifters when I built the bike so I assumed that the hoods were slipping up into the gap left by the missing gear levers. It turns out that the problem was actually that I had wound the bar tape over 2 slot-shaped holes that tabs on the hoods needed to go into. Once I realised, I just had to cut suitable holes in the bar tape and it was then easy to straighten the hoods out. I haven't ridden the bike since then, but I think that will have cured the problem.