Martin Logan Ascent/Odyssey Step Up Trans

Thank you kindly again Jan. Through the kind advice & teachings that I got here from Bolsert & TYU I've managed not only to revived but also modify the XO & bias supply of my Odyssey.
Now for my own knowledge & amusement, Im thinking of getting a better trafo to see if it can better what it is now, perhaps even a custom double C core trafo. Hence am trying to find out more details about it.

Thank you again.