Looks like you have the OPW in RA but the DEC is the old two blocks worm drive. You won't be able to get a spring loaded worm in DEC with that configuration. You need the OPW. You could get the tucked under motor in DEC. I'm not sure about RA though because the worm is just above the elevation knob and there might not be enough room to fit the motor. Check with Losmandy first.
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