Cartridge loading plugs

This question relates to the construction and use of loading plugs for MC cartridges.

Premise, the Exp provides input impedances of 100 Ohm then 840 Ohm, should one wish to load @ say 220 Ohm or 470 Ohm for example, is this possible to achieve by inserting appropriately loaded plugs on the input sockets ?

If so, is it as simple as adding the difference as a resistor of say 120 or 370 Ohm to the active line only or how should it be done ? (and are the calculations somewhat more complex ?)

Plugging in some real world values for a specific cartridge

- DL 102 output 3.0mV, DCR 240 Ohms, recommended load 1K Ohm.

http://www3.sympatico.ca/murraya/DenonMonoPage.htm

shows difference in output into 47K Ohm and 1K Ohm.

With this level of output it should run straight in to the Reflex bypassing the Exp so running into 47K Ohm.

If I have the calculations right then the required value is 1K02, since this is only available in 1% the most likely substitutes are 1K (oddly) or 1K1 giving a load of 980 or 1070 Ohms respectively, n'est ce pas ?

If correct, then I have the general idea, and can move to question the second.

Given that finding a suitable adaptor/plug may prove difficult and that the cartridge be mounted in a headshell with removeable fly leads.

Is there any reason, other than additional mass in the headshell, why this resistor might not be directly connected across the fly leads immediately at the cartridge output ?