I use PRO RS because of the construction design of the product. In case the steel braided hose have leaking, easy for me to fix it instead of buying a new one set.. look at the 'head', its bulid separately. ?Just get a new steel braided hose and change. Stop being propagate by Japan. Not all the expensive thing are good but some value for money. Like turbo timer, the function is still same but only the brand.. Better 200 for steel braided hose PRO RS and 200 more to 'drill a hole at disk' send to machinery..