anyone have any "knowledge" of the MarkIV 46 Bertram's from 94? to 97? Somewhat bleak years at Bertram.. wondering build quality, performance, ride, fuel burn, livability etc. etc. etc..... Looks as thought it is part(s) of a 43, 46 and ??? Who designed it? there is a 96 repowered w/Cat C12's that has peeked my interest... fwiw