I ordered a 773 Hudson product number 40298.  I'm running Lionel fastrack.  I assume I'm going to need 048 track or larger for the turns?  Any help would be appreciated.  I don't believe my 036 track will cut it?  Thanks in advance.  BTW - I have many prewar and postwar Lionel sets and I can tell immediately that Williams is making a very good product for the price.  The Blue Ridge Hauler set is beautiful and runs and smokes great!