Zingers work, but I like to re-work them a little. The Zinger Pro looks pretty good, somebody here had tried some of them. The regular Zingers have about a 1/16" blunt LE and TE. If you sharpen this it really helps.

PS I like the 13X4W APC on my 63, I have a re-worked Zinger 14X4 on the Sledge, also a 63. Either work great, just try to prop it to at least 11K static (the 13X4W tachs at mid 12K static, the 14X4 Zinger at low 11K static.) I don't care for the 14X4W APC.