GOOD DAY TO ALL
I'M STARTING TO BUILD A LAYOUT UNDER A COFFEE TABLE THAT IS A 42" HEXAGON . I HAVE MOST OF THE LAYOUT ROUGHED IN . A MAIN LINE RUNS AROUND THE OUTSIDE THEN TURNSOUT INTO A HELIX THAT CLIMBS A GRADE OF 3% . AT THE TOP THERE IS A BRIDGE SPAN OF 13" THIS IS IN A CURVE AND...