So i received mine today. First for the good part: Combined mode is vastly improved by these. I ordered Yellow and Orange to try both colors, and yellow ended up looking best. Now unfortunately, this being an untested model means there are also issues. These horns are bigger than the original floppy horns, which means i had to sand some stuff down before attaching them, and even then the head has some seams from the new horns prying it open a bit. For robot mode this means opening the chest to reveal the head is a bit tricky, because there's less space to open up the chest. It also means he's got bigger "robot nipples" than with the original horns. So basically, definitely on the right track, though I'd reccomend some further finetuning. But that's all part of the testing process of course, and I have no regrets about buying this.