INSTRUCTIONS! 

Always keep the control sectors / in-level sectors vertically
(or horizontally) aligned. Otherwise the slopes will go crazy.
If you want the jets diagonal, good luck to ya.

If you want multiple jets in your map, add another prefab and;

- add 26 to all in-level sector tags, and linedef 100 tags. 

- add 9 to all linedef 7 tags, and the for respective control sector tags.

- add 25 to all vertex thing angles, as well as tags and front x/y offsets
  for linedef 704's and 705's.