I started out using the Seyco blades as that was where i bought my saw...The folks on here talked so much about FD blades along wit h Steve Good , that is all I use now.
Not the same...a 3/0 is much smaller..takes or can be used with a # 70 drill bit and the #3 blade uses a # 60 bit ........Those are the bit sizes recommend by Flying Dutchman blades.