Heli-coil questions

Haha, i bought two as i thought of it at the parts store. I already drilled it and tapped it. I wrapped the plug in a towel to not damage the threads, and tapped it for a 5/16" bolt. It came out okay, i just want opinions on it if its kinda a half-a$$ job if you know what i mean... Im still deciding on leaving the heli-coil in there or taking the head to a machine shop and see if they can weld it and redo it..