@Brent Behringer I agree with @RL6723 . Go with the closet. You don’t want to string too many extensions together on the same piece of equipment. You can potentially have a fire hazard that way. Check out this article: https://www.reef2reef.com/ams/thermal-reckoning-a-fire-in-the-making.71/So my dilemma now is do I build a custom control box closet which would be on the left side of the tank (between tank and stair rail)> have 9"w x 36"d x 26"h available or do I just place all my controls in the small stair well closet to the left and poke a hole through the wall at the bottom? I'm leaning to placing them in the closet. Issue is some will probably need extensions of some sort. Right side is approx 10" from tank to wall. So by the time I figure 14" plus height to mount them up the wall in the closet, were probably talking 30" to 40" just to the right corner of the stand. Thoughts? Any insight as to extensions if needed? Probably should lay it all out on the floor to see? My 10 gallon ATO reservoir is going into the right 10" between tank and wall. I can also put my dosing containers and pump behind the ATO when the time comes.