For a 42 that once had a factory Sonic one on it... (has all the holes for the side rails) Thanks! (954) 673-2225 Tony.

what color and base width??

I have a fairly brand new one that's for a 26, purple. Never use it. It is adjustable and just might fit. Call Sonic and they can tell.

my assumption was that the width might be the same on most larger Sonics although I haven't measured yet. And, thanks very much for the information on the purple one but unfortunately that's a color that probably won't go well with a predominantly blue boat.