speed bag platform "sweetspot"

[Speedbag]

I never really thought about a replacement for a ball swivel. Perhaps a rope made of Kevlar or similar high strength line might be a candidate. The line would to be highly fatigue resistant, considering the constant bending. I don't really understand the pros and cons of the different swivels. I used to have a ball swivel 40 yrs ago, and it was loud and had friction...I hated it. The chain link that I'm using is quiet and virtually friction free, but I see that the pivot point changes when going from front to back, and then side to side until the unit rotates 90degs.

Also, did anyone ever consider installing a plasma lightening plate near their platform? They are sound activated, probably would flash to the beat of the bag...check out this video in action...
http://www.youtube.com/watch?v=MroEMBDUtIs

That's awesome. Would love to have a rebound board made of that.