I fell for this very simple plywood transmitter tray from Berger Modellbau. The tray is cheap, easy to assemble and very useable. I got one for my dad’s Graupner MX-12 too. I Don’t know if I’ll use it since I am satisfied with the Graupner original but the construction is clever and I’ll make a copy and modify it for my old JR X-347 radio which I plan to use for indoor and small electrics.