I find plastic center finder the easiest to use.
As far as pictures are concerned, you need to post them to a hosting site (Photobucket, flicker, etc) first then copy the link and paste it into your post and use the "image" button above/left of the posting area.
Here is a helpful link
http://lumberjocks.com/GaryK/blog/8899
Here is a link to the center finder:
http://www.woodcraft.com/product.aspx?ProductID=02J14&FamilyID=3046
As far as pictures are concerned, you need to post them to a hosting site (Photobucket, flicker, etc) first then copy the link and paste it into your post and use the "image" button above/left of the posting area.
Here is a helpful link
http://lumberjocks.com/GaryK/blog/8899
Here is a link to the center finder:
http://www.woodcraft.com/product.aspx?ProductID=02J14&FamilyID=3046