Fixing broken 25 gallon/DIY

I have a 25 gallon sans lid in which one of the longer sides glass panel broke. I bought plexiglass to replace it, but now I'm looking at the tank (which is laying on its side, longways) and I'm thinking I should recut the plexigass and put it where the lid should be and put the lid where the plexiglass was gonna be replaced.

I think this will give my BP much more room on the bottom, and less height since they don't really need it. Does anyone know how I could go about doing so, given the proper sides for the lid and glass are designed specifically for the original placement?

We have this tutorial on site. Video showing a similar premise.

Also looking at specs/plans for complete DIY enclosures and using the plans from the panel with the door helps. Just plan to drill small holes for ventilation.

An example.