Doffing robots for changing tubeless packages on the Tornado and removing the finished package. Safety accumulator, which is a safety buffer between the pay-off and the twister. Pay-off creel for assembling or twisting process. Pre-twisting unit, which produces plied twines, when integrated with Robco twisters. Accumulators for integration with twisters and extruders to create in-line twisting systems. Also integrable with take-up winders.