Mate if your going to use the grinder and cold chisel method make shore you wear safety glasses
I have had shards come of the chisel and bearings stick into my arm
not fun
X2 on this,,, i had the top of a cold chisel shater on me,, had a piece of it embed in my chest,,, had to operate on myself to get it out,,,
So PPE is a must.!
BHG