Deleted couple posts, getting kind of off-topic. Granted nothing is ever really discussed here since nobody really played Tsubaki vs other players other than me and a few others.
Back on topic, the Tsubaki Install super works similarly to Hakumen's mugen super. When using the super, you are granted "unlimited" charge to use for your D specials until the gauge drains out. When you do a D-version Super during this state, it will use up all your remaining charge, and its power will be equivalent to what you originally started out with.
For example, if you did Tsubaki Install at full charge, your super will do equivalent to full charge.