@essrand
I have been in your same shoes: moving from US to a 220V country with my audio.
The 220>110 transformer will certainly work without problem, and what glennewdick said above is a good guideline. Whether this affects sound will depend on the quality of the transformer, I imagine.
Using a balanced transformer might be an opportunity to treat the power you feed the pre additionally to going from 220 to 110V.
I had an amp changed to 220V by my US dealer before moving. The amp transformer had 220V taps so it was easy work. Still use it 10 years later and sounds great.
Lastly, check the Shindo owners manual if you haven't yet. My Lamm pre was prepared for multiple voltages. When I moved I simply had to take out the 110V fuse, buy one for the 220V rating and place it in the 220V position and that was it.