Maintaining Fishbone Format

My business makes extensive use of the fishbone concept. However, I rarely use Mindjet's template to make a fishbone because it seems clunky. Specifically, it doesn't really look like a fishbone and it loses even more of its familiarity during use.

Is there a way to maintain the 'backbone' configuration of the Fishbone template while adding and deleting sub-topics? The natural imbalance that occurs during the creation process tends to create steps, line angles and spacings that are inconsistent with a fishbone that should have a perfectly straight backbone off which there are angled bones. The balance around the backbone should stay the same regardless how many topics or sub-topics are added/deleted.

I've explored the many options but can't get it to align as hoped.

Thanks much.