330 express here - added a rack to the transom for 5 rods; and a removeable rack across the top.
The top rack goes into the two top holders and is removable - i put it in to fish and take out to cruise. I use 2 cotter pins.
I custom engineered it a bit for the right height for me - you can do the same. This gives me 12 across the top replacing 2.
You can see from the photo how it spreads out.
good luck Grumpy
