Our rego boys probably wouldn't allow this mod, they hold original frames to be sacred but even without it my bum would only be 4 inches higher, the rest of it should be acceptable .
We don't have that model of step through in Australia but we do have a vast number of CT 110s as the Post Office uses them as the standard mail delivery vehicle.
Does the geometry look sufficiently similar to your model to work as you have done ?
2010 Honda CT110P (ADR)