Hi adep, apologies if I've misunderstood your plans, but ? if you're planning to go down Small Mammal and through to Mud Hall without going near Main Chamber, then you'll have to go through Mud Hensler's; OK? And if you want to stay clear of Main Chamber, you'll have to come back the same way. So, you'd be able to get into Mud Hall from the far side, so the state of the traverse is immaterial . . . ?