I've just logged on, because I didn't think it was right to just let this thread go cold but I see it's now got a life of it's own
Mike has indeed kindly offered to help design the extension, Mike sided with my partner Rebecca, who felt a green oak structure was completely out of character, however, to counter that, she's now accepted that I need to build a bigger bike workshop/store elsewhere in the garden to replace the outbuilding that will make way for the extension(and a bigger bike shed means room for more bikes-shhh) Mikes "too many tools and not enough space" comment to Rebecca could also ease the way for a bigger wood workshop in the future too........
Mike has taken our ideas, along with plenty of his own and returned home to bring these to life, we await the first initial drawings and will go from there. I'm happy to make this a WIP if people are interested.
As for it being my fault, Mike if my extension design is not finished in the next 3 weeks then you are under strict instructions the shelve the project until your house is completed, I already have the shakes and fever, from the withdrawal of your daily build updates.
Finally, RogerS, thanks for the Sketchup link, I'm not ready to scrap the drawing board yet, but that day has taken a step closer.
Jon