I have a 23' donzi center console with a 300xs top speed 58 mph and I toasted the gears and cracked the housing on both sides on the torquemaster lower unit so am in the market for a used one. What would be the disadvantages of using a regular 3.0 lower unit instead of a torquemaster or fleet master. I am mostly concerned with durability because my boat is not that fast but speed is always a factor.