You can choose anywhere from two to seven rows to go with the six reels to adjust the number of ways there are to win (324 to 117,000) on each spin.
http://esca.altervista.org/viewtopic.php?t=3782
http://www.lada-xray.net/showthread.php?p=237630#post237630
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http://treasureillustrated.com/showthread.php?tid=339019
http://oldsite.giessen46ers.de/fantalk/vie...=1&t=254483
http://forum.spolokmedikovke.sk/viewtopic....958589#p3958589
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http://47.88.101.141/forum.php?mod=viewthr...9571&extra=
http://aficionado.pl/showthread.php?535701...ts&p=580806
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http://gwenael.free.fr/diss3/viewtopic.php?f=2&t=10636
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https://debate.socialism.nl/forum/showthread.php?tid=201344