twisted minis
+1y
If you put them inside the frame, the tank has to be moved.
Like I said, if you make them 18" center to center, even with a 2" bushing, that will put them 1/2" off the ground laid out. Mine rarely hit the ground, only on driveways and the like. But if you choose to go that way, keep the upper bar close in length. I would say no more than 20" or so.