correct ER20 and ER16 tool holder for bt-30

I am little behind. 

I could not take the video. 

The 3d printer takes long time to print the parts. I am using 100 % infill. I saved about half the time after using. 6 mm nozle. 

The couplings seem to be more chalange than I thought but I will have a solution. 

I will post about the progress in the proper forum divison I just want to inform the people who helped me in this thread.

Philip