M_Boats: M15 vang and loose foot main.

I have read opinions both for and against a boom vang for the M15. The argument for is that it is an essential sail control, the argument against is usually that it is unnecessary and just complicates a delightfully simple rig. I have also been advised to fly the main loose footed for better performance but have never seen a photo of an M15 rigged so. Anyone add a vang and love/hate it? Anyone sail loose footed? Notice a difference? Paul McAleavy M15 #471 Callisto -- Paul McAleavy 608-576-9006 Contract Customizing