Help anyone - my husband decided to help me clean my rossi grinder and let the dosing mechanism fall apart. I have managed to get it back together but can not work out the dosing cam spring and dosing cam bolt. Have looked at exploded views of parts and I am putting it in the hole but it doesnt stay in - if I leave out the spring works for two flicks of dosing then the cam bolt just falls out. The spring and bolt has got me stumped :(