I've got a number of fusion projects in the works. They all vary slightly in approach and supplies used (mainly testing out how different materials act as the girdle), but all show successful fusions. I think this goes to show the vigor and unique fusion characteristic of the Ficus; they really overcome challenge and find a way, plainly put.
One I'm excited about. It's roughly 12-16" from top of pot to top of tree. It started as 5-9 hardly-pencil-thick rooted cuttings that were strapped together and grown out (in containers, never ground grown, yet).
My images are too large to post and I'm already past what I desire to invest in social media time. If there's interest, I'll spend some time editing and resizing to come back and post. It's all beginner material. I don't expect anyone is super keen.