nah the poly tanks were very easy to cut i used a reciprocating (sp?) saw and was very simple, for most i just cut them in thirds which would make them about 60cm high id say. I thought these would be the best thing as i rent and i can up and move them when we change house which has only happend once so far, thanks for the nice comments on the blueys they are part of a Reduced pattern line ive been breeding for a few years.