The furling-foil on the CDI is a problem when you're trailering, at least on my 26X. (I have an FF II like Doug91Mac26S.) I'm sure the same is true for Harken, Schafer, Facnor, or whatever you get. The forestay is about 3 or 4 feet longer than the mast, even the "flexible" foils are a lot stiffer than a bare steel forestay cable, and that extension is fragile when it's unsupported.
My answer was to make a 7-foot-long "tray" of 4-inch PVC water pipe, cut roughly in half (actually 5/8 - 3/8, and the 5/8-round piece is my tray). I made a couple of "clamps" of over-half-round 3" pipe that I bolted and glued to the bottom of the tray. The forestay, with furled and covered jib, sits comfortably in the tray; I tie it to the base of the mast, and it's a sturdy and quite stable support.
BobM is correct to say "just be careful" - but not just the first time, be careful with it every time! Takes me about 10 or 15 minutes longer to raise or lower my mast, compared with the bare-cable forestay on my Mac 19 ... but two weeks ago, when I was out in bigger winds than I'd expected in the 26X, I was SO grateful that all I had to do was roll in the jib to secure it. Or roll in a little and reef it.