I'm getting ready to install my D845. I read somewhere that this thing needs some spacers to fit in the stock tray. After mocking it up, it's gonna need more than I thought it would. Anyone know if servo clamps would work? I'm thinking 1 pair on top as they normally would be & another pair under the mounting tabs. I checked DDM & large scale rc, neither have a thickness listed for any option. Could someone measure for me? Or should I just use an entire bin of washers & buy a proper tray for my next upgrade?