After looking at the patterns for the side's (TA) and the front frame (TB). I've noticed TB is 5 1/2" high and TA is 4 1/2 high.

Any idea's which dimension is correct.

I am presently building an Ice Flyer. I live in Queensland Australia and unfortunately there is not much ice around here so I will have to use wheels. In any event my understanding of the plans is that the front section TB is curved up in the centre so whilst the centre of TB is five and a half inches, the ends where it joins to TA are four and a half inches. At least that is how I see it. If that is not the way it is supposed to be then mine will be unique.

Regards Norm.