I built a portable, lightweight, yet mighty equatorial mount with two HarmonicDrive gearboxes. The EQ mount weighs about 16lbs and can support 25lbs without counterweights, or 70+lbs with counterweights.

Update: I finally finished cleaning up my design files and released all of them (part design, solidworks drawings, BoMs, PCB boards and so on) here: https://github.com/alanzjl/AlkaidMount

BGMs:
Podington Bear - Bated Breath
Gotye - State Of The Art
Portugal. The Man - Feel It Still
Time to Pretend - Lazer Boomerang