i'm amazed the number of aircraft flying that do not have an attitude indicator (AI). they only cost a few thousand, which is bugger all compared to the cost of a helicopter, even an r22.
it doesnt matter what method you use in IMC, without an AI you will be upside down in a matter of seconds in an unstabilised small helicopter.
try this.... go flying with a fellow pilot/instructor. tell him to stay close on the controls (and keep a good lookout) while you try to keep straight and level with your eyes closed. i guarantee you wont last long before you're in a turn/dive/climb without knowing it.
then add the panic factor into the equation... and you'll realise why helicopters and poor weather are a lethal combination