that was the MICE who chewed through the cheap tubs, not the asfs :-)
I had them in 10 gallon tanks before putting them into the good tubs. Never had chewing problems in either (but I guess they woudn't have much to chew in the 10 gallons).
I hear wood is hit or miss? Either way, I'd rather not bother with the extra level of annoyance if I don't have to :p