Hi Walt- My understanding is one machine only, although you could fill a tube with $40 strikes in any machine.For the $40 machine, you need the second option on the third reel for the $40 tube to stop on. The $10 machines have one "win" symbol on the third reel. The $40 machine will have two "win" symbols. Understand, the likelihood of any tube stopping on a $10 strike machine is 1 in 6. That is not the case for a $40 strike machine. Even though there are still six tubes, the likelihood of getting the $40 tube is much less than 1 in 6. That is based on different programming for a $40 machine than a $10. Also, Shaun has said he will probably post some type of signage on the $40 machine that implies "share the machine". He is going to count on us to do that.