Understanding the Tyros 4 Effects and DSP Blocks.

From my understanding so far Reverb and Chorus is assigned to all right hand parts.

DSP Blocks : DSP Blocks 2 to 9 can be assigned to Right Hand Parts. It’s possible to have more than 1 DSP Block assigned to a right hand part, but you cannot have a DSP Block assigned to more than 1 right Part.

ie DSP Block 2 assigned to Right1 and Right2.

And the best way to save is through a registration ?
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Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700