Whetstone holder

I have bought a cheap whetstone in OBI hardware store, but it was hard to hold on place during usage, so I have created this holder for it. The inner part is from PETG and the whetstone fits there exactly (small problem is to remove it back :-)), bottom part is printed from TPU for better adhesion during sharpening. Assemly is easy - just stretch the TPU part slightly and cover with it the PETG part. Put the stone it and slightly push, that's all. Hope that it will help someone, who also have this whetstone and have same problems with it like me.