Mod that I was using long time ago. Accidentially found it some time ago and adopted it to BLT 2.
It doesn't have any requirements on skills. Use at your own risk.
Known bug(s):

• Sometimes you can't either put sentries or pickup them. It might be related to attempting to pick every sentry on the map, not only yours, but I'm not sure. I'm no longer into modding so I won't look into that, but simple check if sentries are yours should fix this problem. Feel free to do that and even upload as yours.