Here is my tutorial for the UPO bracelet;
You will need several tools.
Removing:
1. A pin removal tool that has a thick pin. This is needed to start the pin out of the bracelet so that the removal pin does not bend in the process.
2. The pin tool above will only get it out about half way so you will need another pin tool with a longer pin to get it out a little further. You need to get it out at least 3/4 of the way to start using pliars (carefully) to remove it the rest of the way.
3. Using pliars, pull straight out. If it is not already at least 3/4 the way out it is very likly you will break the pin.
Replacing:
Align the bracelet and using pliars, start the end of the pin a little into the bracelet. Make sure you use some oil on the pin before inserting into the bracelet. Slowly, push straight. It should go in at least 1/4 to 1/2 way. From here on it is impossible to get any further unless you use a small jewlers/watch hammer to lightly and repetatively tap the end of the pin the rest of the way in. You must do this a little at a time and make sure you tap exactly vertically so as not to bend the pin.
The plastic end of the hammer can be used at the start but you will probably find that the end of the pin start to embed into the resin and you will have to change to the metal end of the hammer as it gets harder to move the pin.
A note on the pliars. Use carefully so as not to scar or bend the pin. I used a pair that had flat on the end with no teeth.
This is the procedeure I used on all three UPO's and it worked each time. But, you have to have the tools and don't even start to do this unless you do.
Good luck.
Usil