Public transport incidents notwithstanding (and causing untold delays
![::)](https://www.virtual-pub.com/SMF/Smileys/default/icon_rolleyes.gif)
), today I seem to have been mostly trying to explain
the real world to a prospective new customer
![Banghead](https://www.virtual-pub.com/SMF/Smileys/default/BangHead.gif)
Just because you can draw / design something on paper ~ even using CAD allegedly ~ it does not mean that it can be made
![::)](https://www.virtual-pub.com/SMF/Smileys/default/icon_rolleyes.gif)
. I was tempted to Google the drawing below to illustrate my point ... ho ho, did you see what I did there
![;)](https://www.virtual-pub.com/SMF/Smileys/default/icon_wink.gif)
![](https://www.virtual-pub.com/SMF/proxy.php?request=http%3A%2F%2F2.bp.blogspot.com%2F_rZurIVfgULM%2FTMLvHA0peYI%2FAAAAAAAAABs%2F6XQ3Ss1soMM%2Fs1600%2Fmc_escher_origional-waterfall.jpg&hash=1ebb78036e5e87cd8309cd4187af6ea58cd3ed06)