Changing runner association
Currently a runner is associated with a project, which in turn makes it difficult to find once you need to remove a runner once created. I.e. you need to try and remember which project the runner is associated with in order to remove it.
Making the runner a user/group associated runner, would enable all the current functionality as well as the convenience of removing it in a central location. Assigning a runner to a group will also enable the group to maintain the runners.