Re: Chasing demons, getting confused. Why would a pump do THIS? Home › Forum › Ask A Member › Chasing demons, getting confused. Why would a pump do THIS? › Re: Chasing demons, getting confused. Why would a pump do THIS? frankrUS Member - 1 Year (includes $3 online payment fee)Replies: 6715Topics: 51 April 22, 2018 at 1:37 pm #74481 Sierra makes ok stuff. But in my opinion, their quality control stinks. When they produce a batch of defective stuff, it may be months before it is reported and corrected. Just my opinion. EDIT: Oops