Hi, 
I am a complete newbie when it comes to sewing machines. I have started to make knife sheaths. 
Can someone let me know how thick I can expect to sew veg tanned leather with this machine? 
Please keep in mind I am a hobbies and not doing production work. Most of my sheaths will be 5/8"or less. 
I have looked for information on the Adler 105-64, but it seems they are not popular.