The grooving fix now selling is already the second. The actual device grooving fix deserved even six stars. Very durable and efficient. It can be very good to work with the device. He resists any groove! The Achilles heel of the device is the stem. Well intentioned but poorly in stability. Even at relatively low pressure bends the stem. After a short time (3/4 year) then he buckled by and gave up his spirit. A new stem can be purchased though, is not particularly good value with Porto. When the device would be a thread, which with the would be compatible at the hardware store venal sturdy wooden handles, then the case would be solved quickly and cheaply, but that may well not be, because one wants to sell their own stems. My recommendation to buy, but 2 star deduction for faulty handle
