I have been playing with my X2's for a long time now and have been able to get the weight down to 126g for the pair and with stock bolts holding the butterflies on. I will be getting some ti bolts in the very near future and expect the final weight to come in at 124g for the pair which is 6g lighter and can be done for around $285 and here is how it can be done.
Competetive Cyclist Speedplay X2's brand new $185 - you should be able to get the cheaper for sure but this is just an example. I got a pair on Ebay for $100 new.
Ward Ti spindles $55 - I bought two pairs of these. One pair with a short spindle and a stock version.
Ti bolts $12 - Toronto Cycles or NJ Cycles on Ebay
Aluminum Butterflies $35 - Toronto Cycles or NJ Cycles on Ebay
It is just that easy. Now I know someone is going to say that the cleats are heavier on the X2's than the Nanograms and that is correct. I am just talking pedals here.
I think this is a great weight to shed a ton of weight on the Speedplay's and I am sure that you can do the exact say thing on the Zero's as well. I have been riding the X2's for ever so that is why I went that route having 3 pairs currently.
I hope this helps others looking to tune their Speedplays. I am a budget WW at heart so I am always looking at ways to do it as cheap as possible.



