Hybrid Top?

[Pife]

Has anyone seen or heard of somebody that has made a hard/soft top combo. I am kicking around the idea of making the sides and rear of my hard top removable? I was going to integrate a roll bar in to the factory top. And somehow make the side bolt on? I haven't even sketched anything out yet. I have also thought about doing the roll bar into the top and having custom soft sides made that use marine zippers to install and remove. Any Idea's on this matter would be great.