Reeflo Hammerhead/Barracuda question

[Alberta-newb]

Wondering if anyone has one of these handy for a measurement. After several hours googling I've had no luck. What I need is the distance from the center of the inlet down to the base (floor). I can't seem to find a diagram.

I would like to drill my sump for a bulkhead and tie a spare Dart in to circulate my fuges, sump and QT tanks. Once the big tank is ready upstairs I'll be replacing the Dart with a Hammerhead. Hate to drill the bulkhead to low to fit.

Thanks,

Francis