I just cut my first set of cores using .020 SS Safety Wire from
www.aircraftspruce.com ($8.80 for a 1 lb spool...should last a lifetime!)
I built this power supply:
http://www.nsrca.org/technical/tip_t...wer_supply.htm
and this table:
http://www.charlesriverrc.org/articl...gmancutter.htm
and got excellent results.