Customizing ottava brackets

[Richie Gress]

Hi.
I am wondering if it is possible to customize ottava brackets at all. Specifically I am trying to

• set how far away they are from systems/staffs,
• set the height at which they begin and end/put them at a slant,
  
• or draw them like a line, so they can be bent certain ways.

If it is possible to do any of these could someone explain how? I would be very grateful because I am engraving a piece that has some note/ottava bracket collisions that I want to take care of.