Instead of relying on device numbers for kernel input, which can change after every restart, you can now use the name of the device(s) you want Speeder to use for kernel input. You will want Speeder to use the same devices as the ones you are physically using. Fortunately, we have an updated utility to do this for you. The RawInput Detector will detect the keyboard and mouse you are using and copy all the data you need to the clipboard. Please see the setup guide here.
The significant benefit of this method is that it is a set-it-once-and-forget-it kind of method. Device names do not change and will work indefinitely. If you change the keyboard & mouse you are physically using, you should update the device names in your config file.