Pouring of the dental stone. It goes of quick once it starts.  

Tapping under the board to float bubbles to the top. There were still some voids in the tool so not all of them were removed.  

A different view showing the mess I made when I overfilled the dam and then pressed the tool into it. The three white dots on the top of the tool is where the dental stone has come through. I drilled these holes for the stone to give it something solid to grip to.  

Tah Dah!!!!! Looks beautiful. Shame it didn't work like that though.........  

This is the first wet with the machine. Hooray!!!!!!!!!! So far nice and quiet bar the sound of the grit doing it's stuff.....  

Ernie on the left with Alby on the right watching in amazement.....Thanks go to Alby for his suggestions and help making this. Not forgetting Manuel, Tony and Carey who gave of their time and money.  

This is a closeup of the surface after about 2 hours of hogging. The spherometer gives readings between 0.09 and 0.1mm sagitta over a reach of 64.5 mm. Because the overarm platform had to be removed twice because of problems, I suspect that there is more than one centre that has been ground. I don't need to remove the overarm again (hopefully) so more grinding should see this problem gradually come right. The edge of the glass is noticeably pitted while the centre is smoother. I suspect the sludge is affecting this.  

After several hours of hogging the outer tiles have almost all come free. I'll continue with this while I make up a new 65% tool instead of the current 80%