I swear by Flying Dutchman blades including spiral , and buy the 'intro' packs of each kind ... yes I go through blades :-) but there's nothing worse than using a blunt one and having to throw the piece on the burning pile!! I do fretwork, scenic and scrolly writing - nowhere near as professional as the legends here but I'm having fun! Hope this helps, and I concur with what Len and others have suggested. Cheers and Happy Days!!
Lorie