Thanks again all for the great tips!
We only drilled holes in the midle of the plate and we will try to do some insolation to get the heat up from the bottom plate.
Think we will try this one out, even do it´s way to big and just see how it goes.
We will for sure make a smaller one aswell! I will post some more images from the progress and let you all know how it goes!
Thanks again!
// Moltas