I haven't used them yet, and won't until his weekend. These are the Tekno 137mm rods, and I did in fact buy the locking rod ends to go with them.
They aren't tight, though, because I drilled the shock body and washers. Using stock I-40 so. We'll see if they leak.
Unfortunately, I don't think they'll solve my problem. I keep breaking the rods right where the threads end, which is the same diameter on both the 3.5mm Arrma's and the 4mm Tekno's. In fact, you can use the stock rod ends, pistons, piston washers and piston nut on the Tekno rods.