i bought a electric retracting system from rcbazaar i received only 3nos of retracting unit i didn't received the sequencer unit where to  uy a sequencer unit may i get the suitable product for the electric retracting system .but the product mentioned complete system for Rs2400 and the pic also the sequencer unit is their but i got only these items !!!!!!!

I searched for this in RCB , no results can you please share it's link sir !

use a brushed esc