Rachmaninoff

 is a Tier 5 Tank that upgrades from Composer and Tri-Builder at level 60.

Design
The is a Flank Composer, or Tri-Composer if you prefer.

Trivia

 * Despite being a Flank Single-type tank, it does not actually branch from Flank Single. This is due to the nonexistence of Flank Bruiser or Flank Bombardmentor which would be able to connect the branches.