Back on the subject of size, I measured my Micromac -R and it happens to be exactly 28'95 centimeters wide, which translates to 11,397638 inches. Given that 1 hp is 0,20 inches, that makes a total of 56,998 hp (in practical terms, 57hp).
It must be due to most modules being shorter by a fraction of a millimeter that I got an extra 1hp in my rack! ;)
I keep some pictures showing a ruler and the micromac if further proof is necessary...