Chainsaw Repair

It is very common for clutch drum to rattle.  Gets worse when there is no grease in bearing.  You can pack bearing with grease and it will go away temporarily.
Either clutch is OK with me.  I've had no problems with either type.  Both types break occasionally.
Check the drum for a groove where the shoes hit the drum. If it's very noticable replace it.  I wouldn't until it starts slipping but that's me.  I do have parts for mine if it should go down.  By they way your'e doing good on this repair.  Don't rev to hard w/o b&c on saw.  Iv'e been told there is a possibility of damaging saw @ WOT.
Shep