A few questions about the 582 side rail engine mount please.

- Are the firewall attach stations for the 582 side rail engine mount the same on a Model III and IV?

- Can the 582 side mount for a Model IV be used on a Model III?

- Did the 582 side rail engine mount for Model III come in two different configurations, to fit one of two (early and later) ring cowl options?

- Can anyone confirm that the 582 side mount for a Model IV is a direct replacement for either of the two different Model III cowl configurations?

Can you see where I'm going here? Assuming it all works out...

Service Bulletin #17 says: " The Side Rail Mount must be used only with the Rotax 582LC engine with the Type C gearbox with the 3 to 1 ratio. It must not be used on engines equipped with gearboxes with ratios of 3.47 or 4.0 to 1. To date Denney Aerocraft has only supplied the type C in 3 to 1 ratio."

- Will a 2.62:1 ration C-box work with the side rail 582 engine mount?

- Where to source new engine brackets and bushings?

Thanks for your help.