My DX4R Pro is currently bound to a DSMR and 2 DSM receivers with no problems at all and that's how I understood it, the new handsets are backwards compatible but the old handsets are not forward compatible. One thing I did find with the old DSM receivers was they do not like the upgraded BEC in some ESC's specifically the LRP SXX V2, and Flow Works.
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----Cougar 2 team----Cougar 2 works----Cougar 2000---- ----Schumacher Bosscat---- ----Traxxas TRX1----Losi XXX CR----Losi XXX BK2---- ----AE B4 ft----Xfactory X6^----DEX210 V1---- ----TLR22 3.0----TLR22 4.0----TLR22t 4.0----TLR22 5.0AC---- ----AE B6.4----
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