Having recently dabbled with a sub-compact conversion of triple to 48-32 FSA, I did not foresee the extra cost of the BB and
necessary BB tools in the conversion. All of your suggestions are 'nice', up to date and may save 4-8 oz in weight but will
require $300-500 to accomplish a 10mm reduction in Q and the mentioned weight over what you have now. You may be
surprised how fast you adapt to the Q factor of the XT you have now.