unfortunately due to the size of mine it cut down the options on design options as making a beam 20' long un supported would have been all most imposable.

I have all so seen videos of that design shaking violently when the router changed directions when cutting, im pretty sure mine is far stiffer that that design all ready. i Had wondered about bracing the ends but thought that possibly making the ends stiffer than the centre would be a bad thing maybe?

I will get a few more pics this morning showing the whole thing.

best regards charlie