Tim,

Remember the old Nacra beamlandings with the straps ? Now that was bad. That allowed alot of independent rotation. So yes the new beams are an improvement.

With respecy to the inside webbing. That is only there to prevent the bolts from sqeeshing the top and bottoms sides to one another. That is bad as well. Round tubes however are more resistant to that effect.

I'm quite sure the new beams are seriously better. However what I was trying to say is that we must not make the mistake of thinking that sqaure tubes make a platform better than a round tube platform. There are some very convincing counter arguments to that false transpose of a theoretical case.

A great example it this.

We all feel that 1 kg of lead falls quicker than 1 kg of feathers, however a normal sized cube of 1 kg lead falls slower than a compressed smaller volume of 1 kg feathers. We must always take great care to not uncritically transpose a certain result of a stricktly defined situation into a much more general appreciation of things.

It is unbelievable how often this is done in cat designing.

Wouter