I started toying with idea once I got from a good friend a vacuum pump. Been pretty interested in doing vacuum bagging for a while now so went to it. A few obstacles in the set up for for the money spent well worth it...umm..until I try it and see how it works! Here's a write up so far if ya care to waste some time:
https://scooter-bangortoportland.blogspot.com/2019/01/building-vacuum-bag-pump-system-for.html
https://scooter-bangortoportland.blogspot.com/2019/01/building-vacuum-bag-pump-system-for.html