With the new Ranger FS series (beginning in 2015), you can extend the 8-foot-6 rod box to accommodate 9-footers. Ranger Fisherman models from 2013-14 have 8 1/2-foot rod boxes and there is no point in extending them as you will not be able to fit a 9-footer with the modification. In 2012 and older models, you can extend the standard 8-foot box to accommodate 8 1/2-foot rods.
SSi rod boxes are molded in a number of sizes using durable UV resistant acrylic capped ABS®. They feature extreme long life polycord straps to secure your valuable fishing rods. Most models are sold in pairs with non marking black rubber grommets installed on one end to protect rod tips.
To extend your rod box, all you need is a screwdriver or cordless drill with a “star” bit to remove the front access panel, and a knife with a serrated edge (think steak knife).
In the bottom photo, you can see a St. Croix Big Nasty 9-foot Legend Tournament musky rod comfortably resting in the modified rod box of my 2015 619FS.