GP7 speaker mounting Seems that I am a lucky guy. A fellow Z scaler decided to also get into G scale, and he is very creative and he has a 3d printer. Dave has seen my method I used on my F3's where I ground off the mounting tabs and glued the speakers in place. He reasoned that the speakers that are behind the fans should have an enclosure, and he also wanted a much easier way to mount them. Here's what he made and they work great! For the speaker in the tank, the tank is so small, he simply made a mounting ring to fit in the tank with mounting holes for the Visiton FRS7 speaker: The mount is curved to fit the tank bottom: Due to clearances, and the fact that gravity is your friend, I just use 4 dabs of silicon rubber to hold the mount in place, and then used the 4 screws to mount the speaker. Now to the speaker in the top of the locomotive. First you mount the adaptor ring to the inside of the shell: This bolts into the 3 mounting holes already in the shell. Next you assemble the speaker enclosure, here are the parts for the next assembly. Make sure you thread the speaker wires through as shown: Now you assemble the plate that the speaker will mount to, and will bolt to the adapter already in place: You have to do it in this order, as the 4 screws will not be accessable later, and one is covered by the speaker in the next step. Now you can mount the speaker: Now you position the assembly in the loco and bolt it to the adapter plate already in place: Now you just bolt the bottom cover on, you see the groove on the speaker houseing on the left side to let the wires through.