Why do you need to level the tripod if you have an inverted head mounted? Very rarely, for multi-row panoramas, etc... But people who do this already use some specialized equipment.
Also, I do not trust those leg locks - seen that lately on some cheap tripods, they look like they may collapse under load.
I use my gimbal mounted atop my tripod. Every shot is perfectly level and vertically straight. This saves a lot of time in real estate photography, plus the tripod is always stable non-adjusting except for height which is handled by a center column.