I have 15 pins, 11 currently set up. While I’d love to have more, space constraints limit the collection size. Coincidentally, I believe thats the maximum amount of pins I can keep completely running and dialed in at any point in time, meaning all repair and maintenance is up to date, with family playing a couple times a week and occasional pin parties - collection is JJP, Stern and wpc-95. Just curious for others what is your number of pins “sweet spot” for keeping all of them optimal.