7 hours. OK (I THINK!) Presumably on your new Hegner?
As an aside, and NOT promoting him particularly, but if you visit Woodgears.ca (Matthias Wandel), he sells a very very easy to use little bit of software which you download from him (complete with "Tutorial", though as said, it really is simple). With that, you take any pattern of any size, and by fiddling with your printer settings (the Tutorial shows you exactly how) you can then print out the pattern to any size you like (it could be really big, over, example, 10 A4 sheets if you like).
And best of all, you choose 2 separate points somewhere suitable on the original pattern, according to the finished size wanted. Set that dimension to ANY real world dimension you like (any units you like) and Matthias' software does all the rest for you, spreading the newly-sized pattern over as many A4 sheets as it needs (WITH little alignment marks to show you exactly where to stick the sheets together for 100% accuracy). I can't remember exactly, but I think it cost me about 10 dollars (Canadian I guess). Oh, and I think it's called "Big Print", but you'll find it on his website very easily.
Very highly recommended, especially for "our" sort of work, AND especially by a real software Klutz like me! Of course usual disclaimers apply, I have no connection whatever with Matthias, I'm just a very satisfied customer