rangerfredbob it is the .60 size stik with the 2 piece fuselage. This one has cut outs for the servos in the tail as well as the servo mounting plywood plate in the middle of the fuselage. I am also moving the firewall back and will sheet the tail with the 1/32 balsa - it just seems too weak for the gas plane for me. I have also took off the plate on the bottom of the end of the fuselage to get access to the tail from inside of the fuselage to strengthen the tail installation - there is almost nothing there to hold the tail in the fuse once it is glued to the cutout in the fuselage. This kit is a good laser cut kit, but the glue job is pretty weak and hardware is not something to write back home about.
rangerfredbob, would you mind posting pictures of your bird with the 18cc installed?