Great plan, I am also doing an 8 x12 plan with three levels. 2 loops on bottom one each one levels 2 and 3 with tubular track. Lionel book state 6 inch clearance center rail to center rail. Would this equate to 3 inches from center rail to outer edge? Concerned as an outer edge runs against wall. I am using O84 for outerloop.
Joe Gozzo