This is my little racer that I built a few months ago. I've raced it in multiple events and it hangs with the x-frames just fine. Recently switched to 4s and the thing is a beast on the 1806 motors! This is the most durable frame I've ever owned. The unibody frame has a lifetime warranty. Who else offers that!?
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I need to buy some of those nylon lock nuts for my props. I was planning to drive over to Home Depot, but it seems you found them at a pretty decent price.
DO NOT BUY ANYTHING FROM HOME DEPOT OR LOWES! Lol you will spend your whole day there looking for parts. Most of the parts you are looking for will get a laugh from a worker (if you can find one there). Multirotormania is great. Good prices and fast shipping.
I've been there before. Most of their nuts and bolts are too big, but I did find some useful pieces to mount my gimbal to my frame. I should be able to find something that'll fit my prop adapter. It won't be black like yours though.
I've had a guy at Home Depot tell me that they don't make 2mm bolts and nuts. Not really a hobbyists shop ;)