I needed a replacement gimbal after my DX8 (Gen 1) Tx hit the floor. Ordered late Monday, had it installed and running by Thursday evening. The FrSky M9 gimbal fits and works with a little soldering of the connectors (video instructions found on YouTube). I'm happy.
There is a lot of choices on the internet to buy products. I returned to Progressive RC to make my purchases because of the service. I will continue to purchase from Progressive RC for their quality , service and product selection.