So I'm in the final stages of my DIY PVC enclosures, it's almost time to order the glass. The glass panes will be ~ 24"x15" (1/4" thick). When consulting a glass manufacturer, given the support my track system would provide, they estimated annealed glass would be able to withstand ~ 25 lbs of pressure before breaking (and tempered glass ~ 4x that amount). I'm already set on definitely having glass over acrylic. They'll be used to house ball pythons.

ANNEALED
Pros:
Possible to modify (Could drill holes for handles instead of using stick on / clip on handles, could adjust if I change the setup of the enclosure)
Significantly cheaper
Cons:
Less strength (easier to break)
Breaks into sharp, irregular shards (Dangerous if it does break)

TEMPERED
Pros:
Stronger
Breaks into tiny pieces (Less dangerous if it does break)
Cons:
Don't have the tools to modify (Would have to use stick on / clip on handles, couldn't adjust size if I change anything)
Significantly more expensive.

Overall I'm leaning towards annealed. I've never had a good experience with clip on / stick on handles, so being able to drill a hole in the glass to put an actual handle on seems like a no brainer. The only thing I'm really worried about is the strength. 25 lbs of pressure sounds like plenty, but I have no clue what that translates to in snake terms. Anyone with opinions or anecdotal experiences with annealed that could give me an idea one way or the other?