Paul Willis
I also bought a couple of RoadRunners, I think, for the Drewry’s, with 1320 coreless motors. They’ll both be rigid chassis, so I’ll use a bit of double-sided tape to hold the motors in place. I’ll write that up when I get round to them.
I’ll make a suggestion here…
Rather than a bit of double sided tape, get hold of a pack of the double sided foam pads. I think they are called “Sticky Fixers” or something like that, and there are no doubt a range of generic ones.
They will allow the motor to move up and down slightly, whilst still remaining fixed. I know that you are intending to use fixed axles, but there may be a tiny fraction of eccentricity in the gearset, or in the motor, or whatever. Better to allow that tiny bit of flex to take place, rather than binding or rattling.
I do try and avoid rigid motor mounts wherever possible. The ways that I do this will vary depending on the application: foam pad, blutac, even just rigid wires. Anything that gives a small amount of movement will help, in my experience.
Best,
Paul