I'm setting my first Maine fisher trapline this fall and need to build the bodygrip exclusion devices. Would other Maine trappers please share your recommendations on whether the front or side-entrance exclusion devices, in either 160 or 220 size, are more effective?

I have plenty of both sizes of traps and plan to build the devices out of wood, unless advised that the wire ones are superior.

There aren't any marten near me, so I'm strictly looking for fisher box recommendations.

Thanks for your help.