How to build a vacuum robot ramp on top of existing one?

[alexas]

As I am renting the place, I do not have the authority to remove the existing ramp at the threshold. However, the current ramp is too low for my vacuum robot to climb to the bathroom. Unfortunately, normal ramps wouldn't work as they require 90 degree angle in the threshold. I was wondering if there are any alternative solutions or adjustments that can be made in this situation. 

Thank you in advance 🙂

 

[MitchellMc]

Great solution, @strazto!

Mitchell

[Dave-1]

Afternoon @strazto 

Thats a nice tidy job I like your solution.

Dave