Great idea I just wish the pins were lighter as truly it is so much work sometimes to move them from one location to another !!!
I can see where this would be a good thing for people that like to have a smaller collection 1-5 pins as larger collections it truly is tough to get bored and you have enough variety. I had a 5 pin collection from 2007-2011 (same 5 pins) and did get bored and the boredom forced me out of the hobby (I also didn't have the strongest collection...T2, Dr. Who, TEED OFF, Cue Ball Wizard and GNR because I was new to pinball and truly didn't know any better as I never played much pinball when I was younger). I got back in last year and went to 16 pins (with a lot of A listers this time) and truly found that was too many (well the wife felt it was too many...LOL) and we both agreed on a 10 pin collection (mixture of many newer sterns and oldies but goodies like FH and TZ) which is the perfect number and is enough that I never get bored so swapping really isn't necessary in my opinion but in a smaller collection I can see where it makes A LOT of sense.
Again, if only they were lighter as the Elvis I just bought is still sitting in my SUV !!!