The dingos are setup fuel wise almost identical to the FZ engines. The only difference is the line from the check valve to the engine is either removed or left to hang. I still use a check valve in the vent line to keep fuel from running out of the tank when the tank is full and the model is nose down. Attached is a crude drawing of what I do on my tank setups. Basically its identical to the FZ drawing except the line to the pressure side of the regulator on an FZ engine is left loose or removed on the engine side of the check valve.

The ARI style mounts require a really still firewall. If your engine is moving up and down when bolted on then your firewall is not strong enough...perhaps this is the noise you are hearing. As for the nose ring fit it should be a loose slip fit I use tape on the front bearing housing of the engine to make sure there is no slop but it must fit loosely and allow rotation easily.

The rubber o-ring in the nose ring can be found at local hardware stores. Here in the US we have places like ACE Hardware, or True Value they carry these butyl o-rings. Any home improvement store should have them. Not sure about your country....but they should be available. Also you can order them from Central hobbies.

Troy Newman
Team YS