Free, pick up cape cod or tfctfn
Blades are all metal (no carbide)
I swear by this grout additive,,,

http://www.striped-bass.com/Stripertalk/attachment.php?attachmentid=58481&stc=1&d=1394315188

http://www.striped-bass.com/Stripertalk/attachment.php?attachmentid=58481&stc=1&d=1394315263

I hate throwing stuff away