Lower Level 28.5" off the floor, Main level 44.5" off the floor, Lever Three 60.5" off the floor
Lever 3 and 1/2 is 78" high. L-girder on 1/2" plywood, Homasote over plywood on the lower level, Homabed on plywood on the Main level, Cork roadbed on plywood on level three and level three and 1/2.
Atlas Code 83 flex track, Walthers turnouts #8 and #6 on mainline, #5 and #6 in yards. 32", 30" and 28" on mainline. 26" in some sidings. 2% in Helix and on some of the third levels.
DCC Digitrax Radio Control, boosters, power managements, block detection.