hi to all, I developed a 3d printable fcs2 plug compatible, to make it easyer and to make it safer I decided to remove the tension rod and replace it with a screw... basically for what I read online a lot of people use one screw to fix fins and avoiding releases. I printed them with abs, I changed a little bit the screw inclination compared to the original FCS2 to have more plastic between screw hole and tab. attached you can find gcode for 0 degrees, 3-5 degrees just the left one, for the right you can simply mirror it with your slicer program. Holes for m5 screws. Plugs have 3 screws,1 for the normal FCS2 fins and 2 for the normal FCS fins. I had to rename the gcode file to txt for forum limitations so download them and rename from .txt to .gcode. One plug weight 37 grams so if you buy a cheap abs 20 euro 1 kg you can have more than 25 plugs for 20€ plus 3€ for screws.