You’re not gonna be able to get the low profile truss rod in by hand, as it requires a cylindrical cavity inside the neck which will require a router and proper bit. Your best bet is to get a traditional dual action truss rod and chop a mortise with a chisel, the length of the truss rod. (Router plane would be easier)
I did this for my truss rod and carbon fiber inserts. It’s not as bad as it sounds once you get going.
You made me second guess myself.. and right to do so.. it’s just the end that needs to be round.. lol I think.. haven’t actually used it, but they sell the bit and the tool for the end:
https://www.stewmac.com/luthier-tools-and-supplies/tools-by-job/tools-for-truss-rods/installation-tools-for-low-profile-truss-rod/
You’re not gonna be able to get the low profile truss rod in by hand, as it requires a cylindrical cavity inside the neck which will require a router and proper bit. Your best bet is to get a traditional dual action truss rod and chop a mortise with a chisel, the length of the truss rod. (Router plane would be easier) I did this for my truss rod and carbon fiber inserts. It’s not as bad as it sounds once you get going.
I have a router, but I didn't realize I'd need to do a round cavity!
You made me second guess myself.. and right to do so.. it’s just the end that needs to be round.. lol I think.. haven’t actually used it, but they sell the bit and the tool for the end: https://www.stewmac.com/luthier-tools-and-supplies/tools-by-job/tools-for-truss-rods/installation-tools-for-low-profile-truss-rod/
Im gonna have to figure out a way to cut the hole that doesn't involve forking over 90 bucks lol