I'm not a machinist , just learning. But for you that are I didn't want to spend $ for a insert grooving tool (and don't like to wait for mail )that I don't think I will use much. I did a little research and tried to grind one out. It's a hss blank and I have the end just a touch wider. Will it be ok to use it with the top staying flat? Many set it a touch below center? Planning on using it on some 1/2" stuff. Only a groove deep enough for retaining clips.

And got the motor mounted, will be counter sinking bolts or using button head.