Phil, a regular contributer to this site, was obviously in a nostalgic view on facebook recently.  I think many of us can say "I Was There" when this kit was start of the art,

I Was There -  Phil Coathup & Punched Cards

Martin Vile
I remember when I started in 1977 having to load all the boxes of build cards through the IBM card reader. Normally 6 to 8 boxes. The IBM card reader was pretty quick but it was still one of the tedious jobs of any evening shift.

Sharron James
Martin Vile only for it to JNRJCL !!! 

Sharron James.
Yes and then they had to be fed in again. 
Sharron James

Martin Vile exactly!!! lol

Steve Hart
Martin Vile Even more difficult when an operator would drop a box of punch cards and they hadn’t been interpreted yet. 

Dave Handley
They failed to mention that the chads from the punch cards were used as confetti and take months to get out of your car and are very itchy when stuffed down your tights- or so I”m told.

Roger K Mills
4 days sounds like a long time to me. Assuming 7.5 hour shifts, that works out at about 1.7 seconds for each card. Surely card readers could go faster than that even in 1966?!
More to the point, how long did it take to punch them? The numbers imply 80 bytes per card - probably 80 columns with an alpha-numeric character in each column. You ain't going to do that in anything like 4 days
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