Miner Moderetor in Elsmar cove suggested:
You may want to change the Eli Whitney reference. While he claimed interchangeability (as did Samuel Colt, Cyrus McCormick and Isaac Singer), he never delivered and eventually gave up. The claim was made as a distraction to investors because of financial problems with the cotton gin.
odern scholars David Hounshell and Merritt Roe Smith gathered samples of the same model products, disassembled them and tried to interchange the parts without success. (Evidence to find)
The first true mass-produced interchangeable parts were actually delivered by John Hall. (Evidence to find, just one from wikipedia)