Just replaced a number of the older fittings on the boom with new fittings. I am not sure how old these fittings are but a number of the blocks didn’t turn at all so they needed replacing. 

Old fittings top, new fittings bottom

Ronstan claims that there new fittings are super light. Having digital scales kicking around the garage, I thought it would be worth my while seeing how much difference there is. 

Old fittings, 235 grams.

New fittings 91 grams

The new fittings are only 91 grams, so a 144 gram savings. While I didn’t do this for the weight saving, it is nice to know that the new fittings are a fair bit lighter. The new fittings save there weight in two ways, one they are made out mainly a light weight plastic instead of metal, and there is much lighter weight ways of securing the fittings to the boat. In the case of the main blocks a rope is used, and in the case of the micro blocks (9 grams each) they are attached via spectra running through the centre of the block.