ORIGINAL: jpanhalt
I can't read your schematic. The lousy JPG resolution makes reading any part identifiers almost impossible. On Bigboat's site, T1 is an ignition coil. Q1 is the thyristor.
Check again, I changed the attachment so it's now readable and both the bobine and the thyristor is called T1.
The attachment was created from this image:
http://www.modelbouw.gompy.net/newcdi/cdi-a.jpg