Hi there, new member here and may be about to join the owners club. Looking seriously at a used 2016 22SSX with the TWIN ELIPTICAL PERFORMANCE PACKAGE and a Merc 115 w/command thrust and a 11" 15P aluminum prop. What kind of top speed should this boat see? The seller claims a top speed of only around 20mph, which seems surprisingly low to me if his statement is accurate. Comments welcome!