Let's not forget that, under the American system, if you make major design changes, and thereby tacitly admit that the original design was wrong, you lay yourself wide open to major court action. I can understand why they try to disguise it.
This is not to support Robinson or any other manufacturer.
For what it's worth, my take on the Robbie is that it's a great machine within its limits, but should not be used for training. To be fair to Frank Robinson, that was not his original intention.
Phil