Updated Readme

Updated readme for 3.0

README.md

@@ -2,14 +2,35 @@ Drybox-NG an Unoriginal Drybox Implemented in OpenSCAD
 
 Openscad Code by sjc (Stephen Carpenter)
 
-Magnet.svg by [Solar Icons](https://www.figma.com/community/file/1166831539721848736?ref=svgrepo.com) in CC Attribution License
 
-Finalized and printing parts.
+# Background
-Snaps could be better.
+
+I really liked some of the Drybox options I found, especially the
+[Unoriginal Prusa Drybox](https://www.printables.com/model/551828-unoriginal-prusa-drybox)
+but I stock different sized heat set inserts and I don't use normal CAD.
+So I set about to rebuild it in OpenSCAD the way I like.
+
+Version 1.0 fell off its mount. 
+V2.0 has feet that hook onto the mount, Magnets for hinged lid and
+doors, and a buffer mount for the rear.
+Version 3.0 goes together without glue so parts are replacable.
+
+# Building
+
+Insert models use my 
+[Inserts Library](https://sancus.carpanet.net/sjc/inserts)
+
+Modify parameters as you like, the default will give a pretty decent
+aproximation of the original that it is based on which will mount on 
+similar stands. Change dimensions and you are on your own. Not all
+parameters have been well tested. Good Luck.
+
+Parts snap together solidly, shove a small piece of filament in the
+tiny holes in between them. 
 
 TODO:
 - Cleanup
-- Handles
+- Door Handle
 - Hold-up door?
 
 Done:
@@ -27,3 +48,6 @@ Top Corners 13hr 126g
 Top Corners 13hr 126g
 Back Bottom Edge (pcm) 12h 136 g
 
+# Other Sources
+
+Magnet.svg by [Solar Icons](https://www.figma.com/community/file/1166831539721848736?ref=svgrepo.com) in CC Attribution License