I had to change the bearings in my Extreme Flight Silver Bullet (very similar to Pletty 30-10) and I found it a bit different and confusing - had to read all the above a few times. Here is what I ended up doing:
> Remove front housing (the bit the prop attaches to) - take out 6 set screws around rim - then it can be tapped out from the opposite end of the motor, down the hollow centre - I just tapped it with the back end of a centre punch. Also push out the front bearing by tapping as well at this stage. You don't need to take out the set screw joining the front housung to teh prop shaft.
> Then to get the winding out. I just put a couple of long 4mm bolts in the holes that bolt the motor to the mount (they were about 40mm so protruded out about 30mm) and held the casing while tapping them with a rubber mallet gently until it came out far enough for me to be able to grab the windings.
> Then I put the casing magnet end down on some wooden blocks and used a 1 inch diameter piece of aluminum rod I had carefully leant up against the edge of the bearing and tapped with rubber mallet - it took a couple of sharpish blows to unsettle and then came out relatively easily.
> Then I put the bearing / ring piece with the exposed bearing edge on the jaws of my metal work vice, heated it with my paint stripping (and heat shrink shrinking) gun (ala removing IC motor bearings) and then used the same 1 inch aluminum dowel to tap around the edges of the ring - being careful to stay on the edges of the ring so as not to deform the centre. I had to use a ordinary hammer here for a couple of sharp blows to get it moving.

And getting the bullet connectors on the motor wires through the ring took a little fiddling and filing - may have been easier to take them off!

Gibbo