1/2, 3/4, & 1T are the same, 1.5T & up are a different shape, appears 46 is different than earlier years - interchangeable models listed here

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics