I guess I do not understand why you need to remove the flap on the trail, this is where my sled heats up, usually not over temp maybe 160 and then snow on tunnel will usually take care of that until we get off trail and into the trees. This AXYS flap 2208364 has no holes in it like the stock flaps and should get more snow onto the cooler at the top or the tunnel.
gtwitch in wyoming