Back to the beginning bluntly, if you want low weight, go search and study vacuum bagging, we know nothing about it, if you want highly conformal parts where conformal of layups to parts may be dificult, then LoVac -may- be helpful provided you use the same techniques, materials and tools. It is not for use everywhere, it will not work properly with other epoxies, materials or pumps. Thats our experience, there are others with similar results as well, there are those who have had difficulty reproducing our results though this is rare, there ore those who have used other pumps and they have all failed to do this successfully following the LoVac instructions.
Hope that helps a little bit?
Now all the experts can weigh in again about vacuum bagging...
...Chrissi