Don’t know but

I replaced mine (#2194) and from what I could tell, the new ones were slightly heavier than those installed. I’ve heard the original weldments were even lighter.
 
3 versions. YES

Yes ...3 versions ....050". Then .063" ( mine is #2569 and has these ) ...then looks like .080" or so as I just bought a new set from vans ...PM or email me if you want to know about adding gussets to existing CHEERS. STEW [email protected]