I 3D printed a set of RV-12 extensions based on the original RV-12 F1290 rudder pedal block design. Same mounting and dims as the original, just extended 1" in length. The photo shows the original block and 1" extension. Final design, after 3 prototype sets, ended up at a 3/4" extension to get full pedal travel for me. They are printed with NylonX (nylon with carbon fiber) and have the same weight as the original blocks. I also designed and printed up a set of matching blocks for the brake pedal to extend them with the 1" extension blocks. They were not really needed with the final 3/4" extension blocks.