We have a Type 6, a Type 7, a Type 9 and a Type 10... where is the Type 8? Ok, it's not missing but if there were a Type 8 what would it look like? Would it be more like an oversize Type 7 or something completely different. I suppose the Keelback could be the missing Type 8 but it's smaller than a Type 7 so it really does not fit in the growth chart.