I had those Kooka cranks on my old GT LTS back in the day, along wit Spin wheels and Magura hydraulic rim brakes, still kicking myself for selling that one...
I emailed about it within 15 minutes of it being posted (Thursday?) and said Id take it. I didnt hear anything. A lady called me saturday night and asked if I wanted to pick it up Sunday so I drove up and got it. She said it was her son’s project but he moved to California.