Magnetic Bed for 3D printer

Update 9/14/14
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• Added a new version that does away with the tape and instead uses M3 screws of at least 8mm in length. SKP file also provided for customization.

• Installs the same way as the previous version as seen in photos of the previous version.
  Although mainly created for use with http://www.thingiverse.com/thing:448686 here is hoping it may be useful for other applications to justify a separate Thing page.

Features
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• Removable top portion secured by four magnets.

• Top plate removable, replaceable and held together by clips (Will look for a more elegant method to secure later).

• A "BuildTak" build surface makes applying "Blue" tape a thing of the past!

Important Note
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• The aluminum plate was from the Thing-o-Matic heat plate. It is used to support an 8x8 LEXAN sheet found at the Home Depot (The LEXAN sheet is actually bigger but is cut to be 8x8). A Countersink was used to drill enough of a hole for the six screws to be flush for a second sheet to sit on top. The build surface is installed on this second piece of LEXAN and can be removed when a print is finished to assist in the removal of the print.

• It may be possible to have the screws installed on just the LEXAN or print a flat surface to support the first LEXAN sheet. An alternative to those that don't have this aluminum plate readily available.