This pack is dope, although I already bought a few of your other bases. 

Actually, your Base 5 Mystery is one heck of a nice approach I've not seen before yet and I really like the concept to have a choice. Either bomb through the base if you need to hurry in a PvP environment or take the time and do the relaxed puzzle solving process to get to the loot. That is extremely nice dude! 

If I had a wish, I'd like you the make more of these, some easy some really complex as that adds a whole new layer of diversity to the game if it's not only the monuments that offer puzzles but the rbs as well. 

One thing though you need to care for:
Nobody knows! What I mean is, for the average player who doesn't know about this description of base 5 here on CF, they don't know they have two choices but will try to bomb their way through. You have to add some kind of info graphic, maybe even on the outside, that tells players that this is a puzzle base or something and they have options. Know what I mean? Like make a sign, "Puzzle me to loot" or something, idk. Up to you mate but you gotta add some hint at least or nobody will really know.

ALSO....
I usually like to try before I buy, I just bought your pack because I know the quality of your other bases so far but for the future it would be a really really nice thing if you like had a server where those bases are in frequent rotation and everyone could try them out so they know if they're fitting in their server profile / player profile. Just saying, it would be cool if you had that. 

Keep up the great work mate! Very high level of detail and thought you're putting in here, don't let that slip!