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Actually my comments and for that matter Cdw's were about the abbreviation that you used not the rockers. You are correct about a couple of things however. Yes the Iskys are way bigger than the cranes and can no doubt be safely lightened. I have used both many years ago but since I switched to Harland Sharps decades ago I have no interest in modifying the set of Iskys that still lie in my spare parts stash.

Show me where I said I had no interest? I just wanted to fully understand your whole comment and didn't understand the whole post so I asked a question, to which you got butthurt over. I was nothing but polite in my question. You then deleted the whole thing because I wanted to understand something I didn't. I was intrigued about lightening them.

Here’s what I did-

They were also wider before I reworked them, and the tips weren’t aligned with the valve stems.
So I matched them up width-wise to a set of iron Cranes I had run.

Depending on how much time you want to invest in rocker lightening, there are some stress modeling programs out there you can do analysis with, like Fusion 360.

Isky use to sell only their early H.D. rockers, I'm not sure exactly when they switch vendors or decided to start selling the cheaper ones like Sig Erson sold

I'm interested in the info and also was curious as to what your acronym meant ... At my work it's acronym city and I get a good laugh out of what we come up with for some of the electronics chassis we build inhouse.