Thanks Jazz

I did/do wonder about the requisite stiffness, but as I have no practical experience in this field I have to read, listen and assess as best I can... I am on a few photography forums and the nit picking arguments about lens quality etc is the same sort of thing I think... sometimes best just getting on with it and having fun rather than worrying about the tiniest improvements.

will make the changes to the frame in final ( hahaha who am I kidding... it will change up to the day building starts ) draft ... lots of stuff to learn/ work out how it goes together yet...but some of the builds here have really given me ideas... and tripled the original guestimate LOL