"Prosport Evo digital Gauges - Fuel pressure sender

Well the Prosport fuel pressure sender went bonkers after a couple hundred miles. Prosport wants me to send it back at my expense for TESTING ??, and if it is ok will ship it back, at my expense. This is all for a $24.00 part. I was also told that in Feb they revised this Evo Fuel pressure gauge and the fuel pressure sender. I asked about sending my gauge and sender back for warranty for the new one and was told that my gauge is ok and to send the pressure sender back. Obviously they revised the gauge and sender because of the many complaints and problems, but in my case they do not want to honor this warranty. Their policy dissuades warranty for malfunctioning gauges and parts."