Hello. Sorry to read that you have problems and that you are not satisfied. I only bought all the radio modules from Yasar’s website. Not yet EFIS and MCP. I had a little problem at first and Yasar always answered me during the day and even 1 hour later. He solved my problem, which was because of a bad configuration file. This can happen but the most important thing is that the seller finds the problem and updates his configuration file. Today everything works very well. I am very happy with the products and very happy with Yasar’s after-sales service, which I find very nice. I will still invest at Core Flight Technology in the future. I’m sorry you have problems but I wanted to give my experience with Yasar and Core Flight Technology.
Bonjour depuis la Belgique 
