ShopTalk: Reshafting Mizuno TZoid Irons with parallel tip shafts

[Rob Campbell]

Hi,
Sorry to beat a dead horse but does anyone know anything to watch out for when reaming Mizuno irons from taper to parallel? Do I have to start with a smaller reamer and work up to the .370? I don't have the reamers yet...will I be ok ordering must one .370?
Thanks in advance.
Rob