OK, so I'm going to. Demonstrate how. Converting to corners doesn't work, so I'm going to take this corner right around here. I'm going to select it. It's my layers locked. OK. Unlock that layer. Alright, select it. Of course you know I can move the corner. 

OK want but. If I go up to properties and I want to put in precision. Let's say I want to 1/8 of a curves up put in .125 inches. It snaps to .002 inches. Which I can only. I've only guessed that. .125 the input is accepting it as a point and then converting it to inches rather than let me with precision till it exactly the interest in what?