Sparkmaker drainer surface

This is my idea to helps the resin drain form the flat surface of the print bed (after tested the Kirolab version).
You can still fasten the screws without big problems, I used a double side adesive to attach the part to the upper side of the bed.
The square hole fit very well, but it can depend from printer to printer (I user Polysmooth PLA with a FDM printer then smoothed with a Polysher)
The only draw back I found is that you can fill less resin (of course) and if the model is big maybe you need to add more resin in the middle of the printing.