First of all it's not my design it's Izzy Swan and Thom Stevens, yes I did redo the drive train here a video of my saw
and here the video that started
as for blades all I can say is the only blades I have is coping saw blades...1 pic is the drive train and the other is the blade holder
I just finish building a scroll saw see pic...One of first 3 project one was a heart for the wife and the house number all I have in it is a whole $6.00 included the drill use to power it