To be honest the stock PR servo horns are stout! It's very rare to see one strip. Usually only happens when the servo mounting screw backs out some. But how short they are give them great duarability but also not very many aftermarket options. The losi 22 "shorty" horn is probably the closest to size but beside the ball stud mounting hole size, the servo arm "offset" is slightly different than the PRs straight up and down design. The the ball stud will need to be shimed some to get a straight servo link. Not huge deal.... But I've been driving PRs for almost 3 and half years, with every single model they make and have never once stripped or broke a servo horn....not saying it wont happen just very very rare and probably a spectacular hit to watch actually happen lol.
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