Sony SCD XA5400ES tube rolling?


Just got my player back from Modwright,fully modded with the ultimate upgrade. Wow! incredible difference over the stock player even cold out of the box.

Now the question, anyone have experiences with tube rolling with this player? The stock Russian Tung Sol 6SN7s are supposedly fine, but I decided to order some KEN RAD WWII military (VT231)tubes and see if there is a big difference in sound. In the mean time, awaiting their arrival... comments are welcome.
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FYI, for those interested in giving these a try, there is a pair of Sophia Electrics sitting in Audiocircle forum for sale with only 6 hrs of use for $150.

I have no affiliation with that sale or with Sophia. My only connection is that I'm a satisfied customer :)
The Sophia Electric 6sn7s arrived today and I will compare them to Shuguang BT CV181-Z in my MW Transporter.

If anyone finds Mullard GZ32 or GZ34 too sweet, check out Sylvania 5U4G green label blackplate. It's very neutral, transparent, detailed, complex passages are no longer smeared ... excellent in my MW Transporter.