[cheapeto]

To me in my wee mind anyway, you have an excellent quality scooter brand, if an upholster shop can reshape the seating padding, your good to go.
OR, if that is not possible, you should have decent resale or trade in value, to find what suites your stature.
Some folks have the skills to fabricate what they would need to do to relocate the gas tank into the floor, reshape the main frame, to lower it that way. But you trade away the storeage area.
I love to follow the Ruckus rebuilds, as some of those guys see the the Ruckus scooter as base for total reconstruction.
However the Ruckus has a lot of part manufactures, with prefab parts ready to bolt on, from headlights to tail lights and everything in between those 2 points.
I absolutely love the Ruckus rebuilds myself, those folks are very dedicated to their rides. So very creative.
I'll be riding down to the Mountain Crawl in Tenn, this year, just to see what the Rucki dudes and dudettes have done to their machines.
Well the 3 days of riding the Tail of The Dragon will be crazy fun to.
Best to you and good luck however you decide.