Here's another option for you: make hoop lugs with a paperclip or two. I discovered this on Apogee Components' website, and I like this for semi-scale rockets as they look less imposing then a launch lug. To do this, take a large paper clip and find the bend that slips around your rod - probably the big one for a 1/4" rod. Holding that bend at the top, cut both lengths off about 3/4" down, then bend them toward or away from you at a 90 degree angle about halfway up the remaining length. Drill two holes side by side on the body tube, insert the ends straight end, and stand it up so the part from the bend outward is perpendicular to the length of the rocket and those ends are now pressed along the inside of the body tube. Slip your rod through this dry-fitted hoop, and if the rail slides smoothly without excess slack, glue it down. Repeat the same procedure several inches above or below the first and you're set.