Look great, I begun to build mine, but I have 1-3 20-30 minutes per day (got a new born) so it's not going fast.
For the magnet, you can try to heat them with a soldering iron, glue should melt so you'll have time to remove it.
For the magnet, you can try to heat them with a soldering iron, glue should melt so you'll have time to remove it.