So I had an idea today. I tried it once in my room, and immediately told my roommate that we had to get the camera and go outside that very moment. This is what I stumbled upon:
I want to try and develop this further, and I want to buy another ken to modify and put more cups on. I want to reverse the spike to make a teeny cup to land on (probably as hard as spiking a kendama!) and I want to put a spot on the bottom of the ken between the slip stop and the rim of the bottom cup. I can also land it on the string hole, but it’s hard since I’m using a fixed tip.