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Trusses are designed as a complete system with various loading on different members. So your trusses are most likely designed for an approx. 10 psf Live Load on the bottom chords of the trusses, along with a roof Dead Load and Live load on the top chords of the trusses.
If you cut and move any members in a truss, all of the load will redistribute differently to all of the members and potential over-stress various members.
Your best bet would be to look at your trusses and find any stamps on them that were put on by the Truss Manufacturer. Then you can contact them directly with your request and they could possibly run a revised truss configuration through their design software and advise you on what your possibilities are.
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