Ok, I will take this one personally. Thanks.
I have come up with the idea of building Avia B-534 back in 2007 or 2008. The basic model has been completed by a modeller called Erbiac, but he did not plan to continue with the plane. I have organized a small fundraiser within Czech and Slovak IL-2 community to get this plane and cockpit finalized via a professional modeller. It has been then implemented by DT programmers for 4.09 release. Same story with Letov S-328.
Enjoy.