Keep working on it! Change to F-UI later if you need to. I'm working on a freeware edition 3d editor myself and am using BlitzUI with it.
Look at the blitz's "CameraViewport" command. Here, you can keep a section of the screen for 3d and create BlitzUI commands around it. Works great for me.
Look at the blitz's "CameraViewport" command. Here, you can keep a section of the screen for 3d and create BlitzUI commands around it. Works great for me.