they are aiming to be legal for 2006, no one will know for sure until april 1st 2006 but if LRP are trying to get them legal then they must be within the limits.
the 3800 'fat boy' cells were no bigger than GP3700s so that 'big mama' name might be a little miss leading.
personally, for club, regional, or even national anything more than 3300 is enough, volts are the main thing, I think Cragg was only using 3300's this year and he was not disadvantaged.
higher capacity does help to keep the volts higher over the whole run but its not 'needed'
regarding the square cells, I am not sure it would help, the way that batteries are made up leads them well suited to a cylinger shape, even the square batteries still had round ends (if that mades sense)
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