look up
www.lulu.com and download the free manuals for how its all done
a bit like the swing ball only more balls i suppose
I tried for along time to create challenges to release the motorskills (I knew i had from other sports)In the beginning I was getting hit and I knew that I could not be that bad,I had to design a set of moving targets or balls that moved
choatically on all planes,but did not get entangled ,it looks simple but in reality in any other design the suspension arms will wrap and knit,
brendan