All i did was run a few quick mig welds radially in the inside of the sleeves and tack a few ''tits'' on the outside and tapped them out.
The welds shrink the sleeve and the ''tits'' give the punch something to grab on to.
They came out so easily that i barely had to hit the punch with the hammer from the other side.
Don't weld too much though, you are trying to put some heat in there so it will shrink, not build a pipe line!
Let it sit for 5 minutes after welding and they almost fell out with no harm to the inner surface at all.
