It is now possible to use the "ch" (check hotbar) command to check abilities & items in any of the top hotbar slots. Please see this picture to understand which number corresponds to which slot. For example, ch17 will check whether block is ready to be used. The "chid" (check hotbar ID) command will also work to check the ability IDs of slots 17-19.
This change requires updating Speeder to version 66.