[comdpa]

The 87's copper underlay thing was over sold I think by later day proponents. I think all the old blades from back in day had a copper underlay, or so I hear. Your 29's are just as good Id bet. Modern lofts too. Why change if you like em.

The notes in my 6th were either done by me or Lynn or me under Lynn's direction.... I honestly cant remember which are which in some instances and so I hesitated to attribute that business to the green one. Thankfully most of my notes are in pencil and can get erased , modified as more eggs hatch in the hatchery. Its a process. Most often a blind one but sometimes guided.

I have the 7th edition notes if any interest.