Having done some conversions, 5-reel games are a lot harder to convert than 3-reel machines and there are less options as well, seems like there are a LOT more 3-reel kits/games S2K's than 5-reels. I'm not talking about what was made (no idea on the actual "sold stats" I'm just talking about what's on the market for sale. You may consider adding a 2nd machine to your collection that is a 3-reel single line and that way you have both to play with. Double Diamond Deluxe is attainable as a 3-reel conversion kit, that game shows up all the time (and is one of my favorites). Games with the Haywire feature show up too, which are also a lot of fun, but are 3-reel. On a home-machine, I prefer to play 5-reel games myself as I love the more frequent winnings, even if I'm losing money (it's my money anyway). However, if you're looking for kit options, 3-reel single-line is going to give you the most options.