Yaskawa GA500 with SI-ES3,U1000

Hi, I am thinking about changing my existing VFD against one with Ethercat Option.
I found the Yaskawa GA 500 wich could be connected to ethercat using the YASKAWA, SI-ES3,U1000 interface card.
I didn`t find the vfd in the long list of the yet implemented devices so the question would be how to do so.
First option to use the esi file and to build the hal by myself could be a bit too hard oder too demanding for me.

The GA500 should be full cia402 compatible related to the documentations - does this make it as easy to integrate as with the servo drives?

What problems could occur?
 

The existing VFD is an Invertek and it can not work with Ethercat - the reason I think about the exchange.
Why that specific one? Mmhh - I had Yaskawa components in another mill and was very satisfied with the quality and the GA500 with the interface card is relatively cheap to get here in Germany.

As Servos I use 4 x A6 OMC/Stepperonline