Hey Andy, like Dan said there are some books on lure making....but none I have found With layout dimensions, Unfortunately what I have found is a lot of trial and error, But with that I found a greater Sense of accomplishment......When you get it right. lol I recently attempted to make A spook style bait, Once I came up with a body size and shape I was happy with, I then began to experiment with Weight sizes and positions, I made two Baits That I thought would get me in the ballpark, Tested them in the sink, And then took them for a swim, It just so happened that the first one I made was dead on! I had a smile on my face for about a day and a half..... Now that I think about it I still grin every time I think about that plug. I truly enjoy every facet of plug building But I think experimentation is my favorite part. Taking different styles and ideas and melding them together to come up with something of your own Or being able to replicate your favorite plug There's just something about it that's so rewarding, I am more than willing to share Anything that I have figured out or the Dimensions of the plugs that I build with you, After all isn't that what we're all on here for, Rich