If people want to try it without spending so much, Ebay has much cheaper ones: https://www.ebay.com/itm/194063513469 https://www.ebay.com/itm/194063513469 If

If people want to try it without spending so much, Ebay has much cheaper ones: https://www.ebay.com/itm/194063513469 https://www.ebay.com/itm/194063513469 If you do find it useful then it's worth spending the money to get the best available, but I use the cheap one and it's great.