I did use a resistor on the 200 as well tbh, in fact I still have 9 of the 10 pack I bought laying around somewhere.
You would need to check the resistance of the standard airbag and match the resistor to it. Quite how safe it is to wack a multimeter on an airbag I don't know. I know they won't go off if you twat them with a hammer, but will if put in a bonfire Fiddling electricaly with one might be a problem though.