I constructed a vac this summer as per your directions. Used it on two removals and thought it was great :-D
On thing I learned early on, if I needed to shut off the vac for any reason, be sure to have something to plug the end with. I did have some issues with lingering bees in the hose when I was done. A few raps and they went in.
-Paul VanSlyke - Deposit, NY