I will usually search out Konamis. My two favs are Vibrant 7s and Diamond Spinner. Since I am a Harrah's loyal, the only place near is Bally's AC that has A5's. Going to Aruba again in Nov. The Alhambra casino has V7, DS and Dragon Crystals. So that will be my parking place.
Sitting next to a lady at Ballys playing V7s for .35 a spin. She hits free spin, get 5 green 7s, goes into progressive and get all 9 squares for $1000. My best has only been 8 square for $300+, but I keep trying.