anyone weighed these? wondering if it is worth getting lighter ones (but only if the SRAMs weigh more than 10 g)

I weighed them a couple of years ago. I could be completely out here, but from memory they were around 20 grams each.
If you look around on the usual auction sites you can find carbon replacements for around 6.5 grams each including ceramic bearings

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Lefty heaven

well my cheapy alloy 11 T jockey wheels arived so I fitted them, in the process I did the usual wieghing

pair of SRAM X0 11 T jockeys: 27g
pair of cheapy alloy jockeys 19 g

saved 8 g.

these jockeys, MFD brand, looked like the best price/weight compromise. they come with 2 plastic bushes, not shown in the photos that make them 1.0 mmm wider than SRAM jockeys, still thinking as to whether that is a problem (i.e. less bolt thread engaged) and as to how easy it would be to thin them or make a bush from 0.5 mm aluminium, hmmmm.....

.... well it bothered me so yesterday I took them out, and rubbing them over a file reduced the height of each by 0.5 mm. now I have the same amount of thread engagement as before, plus threadlock so job done.

wasn't hard to do, just need to rub them them in a circular motion on the file, rotating them 90 degrees to keep the filing even.