I went to germany and stayed there 14 months while at the uni...when was in my internship I could find a flying club locally to fly there, and all the people without exeption flw with what may be called the standard there...big radios that were a tray themselves... for the " american style" radios like my futaba 6exa fasst...Robbe (german distributor for futaba) had some trays for the radios...I bought one and immediately felt a very good difference... I could control more precisely the plane because my hands rest and could have better stick grip. It makes me fly more relaxed since I don´t have to hold anything... just rest my hands.
Now I´m looking to find a nice for my Aurora 9 (multiplex sells a very nice one! bit pricey too...) or maybe I just build one from wood,,,or maybe foam, glassed and painted...may look nice.

Germans swear about this type of radios/trays...the assure you you are going to have a better control. I find it true...but anyway, it depends on how you feel, and the way you get used to fly.