Mold by floors - Fast open system

I'm trying to make a cast a model in PLA to Aluminum, after several failed attempts mold as cracks and other horrible things xD, I decided to try this for see if works better, moldel in two parts.

once filled and dry the first half of the mold,, climbs a little frame and the second casting mold is made.

this thing is based in this other http://www.thingiverse.com/thing:1237515
It has been changed as part B gave me problems in the slicer, and also Part A has been perforated to have a pin instead of the original site mounted file

It works very well

PLEASE! do not use this or any other mine contribution to make money.
They are shared to enhance DIY.
Thank you

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If you print one I would love to se