Bracelet questions for sports models?

[SLR]

I searched and found some of the answers i'm looking for, but i'm still a bit confused on bracelets for the sports models.

I understand that the Daytona's now have solid center links, and solid end links, which means that the entire bracelet is solid. Same goes for the new GMT IIc's.

But is it correct to say that new subs, SD's, and older GMT's all have hollow center links? Do they have hollow end links too? Or do the newer ones have SEL's but still maintain the hollow center links?

I guess my question is which sport models have which kind of links?

My reason for asking is that I was at my local AD today to look for a daily wear rolex, and I looked at older GMT's, no-date subs, date subs, and an SD. And with the exception fo the SD, they all felt really light compared with my daytona.

thanks in advance for any clarification!