UML Designer with JavaFX

I was planning to write an online UML designer with JavaFX. I found a couple of similar applications such as http://www.websequencediagrams.com/  and one more that I think was flash based and I can't find its site now.
They were all good but had their own flaws.

I tried JFX for a some days. Although it is now only on preview version but I could try most of the features and do a couple of tests, etc. I also tried it with NetBeans that made it so easy.

I found JFX a bit weird since it is a script based language and its integration with normal Java is a bit vague now.

At the end I found this fantastic tool on tigris: http://argouml.tigris.org/. This is what I wanted to develop with JFX. Although the look and feel might have been better with jfx but this software is already complete in functionality!
So I dropped my idea and now enjoy using this software using webstart!