Suggest you speak with Herbiesaudiolab.net at 210-530-8680 whether they can supply their "threaded stud glider" in the thread and length dimension suited to your application, This is usable on either bare floor or carpeted floor.
Very long-standing vendor who has helped many systems, minus original threaded spikes (even when the original manufacturer thought spikes essential).
Very long-standing vendor who has helped many systems, minus original threaded spikes (even when the original manufacturer thought spikes essential).