Pretty sure this thing isn't 60 HP, but rather 59 HP.
I have one installed in an Arturia Rack brute which is has room for 88 HP. I have installed:
- The power supply (5PH)
- Erica Synths Black Dual EG/LFO (10HP)
- Erica Synths Black Double Bass (10HP)
- BEFACO OUT V3 (4 HP)
5 + 60 + 10 +10 + 4 = 89
EDIT: As megarat pointed out, Arturia offically states the Rack Brute as being 88Hp, but in reality it has 89!