Looks good John, How did you hold it to balance it and what did you use to glue the lead weights, JB Weld?
Well to balance it, good question:
I pondered on this and was trying to think of all the ways i could balance the flywheel, and came up with this not very scientific answer, i figured that the two magnets either side at the top would cancel each others weight out, and that left only the magnet at the bottom, so i just weighed it and @ 60 grams i added the replacement weight in lead.
Yes i used JB Weld to glue the lead on.
New Flywheel below for comparison

John