Only draw back to the high rib was a few added ounces. But, I do have a 1946 16 28" with a pad 14" lop that weighs 6 lb 13 oz.
Wasn't it around 1939 with the new high rib that they were supposed to have beefed up the stock head a little. Note especially the stock head strips on photo trail. The 1921 16 (average thickness .085 and the 1945 16 (average thickness .129.
As years went by the standard checkering area also shrunk.