Our club [DGC] has two permanent regulation FITASC helice rings set up and running all the time. For smaller USHA shoots will have three running, shot down the line w/5 targets per ring and two cranks per 30 target race w/the 2nd starting on the 3rd ring, so the race ends in ring #1, visible from that end of the clubhouse. And usually another 'practice' ring set up and also running on another part of the property. For larger Nat'l. type events we've had as many as five rings running.
You can find all the dope online by going to:
https://www.ushelice.com/It is a decidedly fun game and more difficult than box birds. The timing is also different.
Going back quite a ways, when we first started shooting the more modern helice targets on single target traps, one the best flyer shooters ever got a 'load em' on the first ring's birds in a 20 bird race [30 bird races were yet to come]... and w/o missing a beat turned to the crowd and said, "Who hooped these things, anyway?!"
It's a great game/fine sport that deserves to grow and unlike some of the other target games, it is a relaxed pace and you do not have to endure the elements for lengthy times, be they hot or cold or shoot four or more boxes in an event waiting at each station w/the permanent pavilions we have for shooters and first hand up-close observers and clubhouse proximate w/its amenities. On any given day that the club is open, we can shoot helice, barring a scheduled helice shoot taking place. If it's raining, portable pavilions are set up for the shooter over the voice pull station.