This 172,28 and 118,35 numbering thing has me stumped...so I create an analogy to help me understand :
1. I am trying to mark my red car so all know it is a red car...and not a white car...
2. I paint on my red car "This is a red car because I can make exactly 1,000 red cars with the the 10,000,000 pounds of car parts and red paint I have".
Why not just mark the car... "Red Car"...? Seems the numbering system is very convoluted...what the heck were the Germans thinking...??? <img border="0" title="" alt="[Eek!]" src="eek.gif" />

<img border="0" title="" alt="[Eek!]" src="eek.gif" />
Excuse the brain fart...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />