Was asked about what 3D printing & SLA are & realized I had failed to add some info.
So here is my quick explanation.
A 3D printer works a lot like an inkjet printer but with a 3rd axis so by adding thin layers of a material layer by layer we can create a 3D object.
SLA is Stereolithography printing. It work by projecting a design with UV laser onto UV curing resin, the hardened resin sticks to a build plate the plate is then raised a small amount. Then process is repeated creating 3D object.