singletrackmind:- after stripping 5 HT2 BB’s over the last 6 months (not mine), all had failed on the none drive side bearing. All due to the ingres of water, which quickly rusts the bearing track and balls overnight. Then when next used, if it does turn, it will be grinding its way round with rusty pitted balls and bearing surface.
My guess is that the radius on the back of the crank arm helps to channel the water directly into the seal area of the bearing. The drive side however, gets a lot more protection from the spinning sprockets, which will help deflect any muck and water away from said bearing.
gunthunter:- I did it myself. Got the idea from when I had my 5spot, and just happen to have kept the grease gun after selling it. The grease ports are from some old spherical bearings. To get the grease ports where I wanted them, I had to mark the BB cups when they were in the frame, so as they would return to the same spot when refitted. Not expensive, but a bit fiddly.