I've just checked that model, and whilst it's far more 'finished' than I ever got, I'm afraid the scale is completely wrong. I appreciate that papap has done this model without an actual kapex for reference, and I'm not saying he hasn't done a good job getting the 'look' of it right, but the whole thing is oversize by between 10 and 20%, depending on which bit you measure.
I just wanted to warn people before anyone used it to plan anything firm.
papap - no offense meant. If you want, PM me with your e-mail address & I'll send you the model I did a few years ago (which is shown earlier in the thread) and you're welcome to use that to adjust your model for scale. I never did get any further than the base casting, and I doubt I ever will!