Octalink a funny name for what is essentially a spline system. This was a wonderful creation by the people at Shimano. That is untill they amed the crank bolts 10mm instead of 8mm. Then of course made it a challenge to remove.
So next week I have to go by work to torch the crank to get it off. Though the good news is that on Monday can go by the shop and pull the non drive side off. Then pull the plastic, yes that stupid plastic cup out and replace it with a metal one. As I suspect it's died in this winter weather.
Hopefully I can get a few more weeks out of it. I really don't want to shell out money for another crankset yet.