I have the IM 100 internal.
While it's a nice tank go for the external model.
With their stand you should insert a piece of wood into the upper read tubing the tank sits on.
As close to dimensions as possible. Screws will pull it towards the inside though.
You can do the front too if you want to.
This allows you to affix things into the wood instead of relying on thin wall aluminum stand.
Also the mat under the tank, don't use screws, use a folded piece of tape to hold it. My 1st screw went in crooked, NOT GOOD!