do you have other razors that can cut you arm hair above the skin? could be that the hair is just not well suited to that test. I seem to have the same problem but i just do a test shave and it seems to have a pretty good shaving edge.
Printable View
If it can still cut arm hair at skin level after the 8k - give it a shave test, that's what's important. None of my razors can cut arm hair above the skin - I put that down to my hair because they certainly do a great job on my face.
Circles really de-burs well