I have a nutsert kit I was going to try with 1/4" wingnut bolts,. but back to work so I can't work on this until next week.
The pro flap doesnt keep much snow in the tunnel on trail but it is a help on days where the trail is packed. Riding low elevation (0-2500' coastal), conditions can change considerably - always in powder agreed it isnt needed. It should be an easy upgrade from factory .....Have actually tested a sled side by side with and without a flap? I have never run a flap on my Polaris. I drill it out from the factory because there is no difference in trail temp between a flapless sled and a factory flapped sled when they both have scratchers down. Furthermore stock Polaris flaps do very little to knock snow down and I would say from the factory AC stock is worse than any factory set up. If you really are that lonely and need to ride close to your friend on the trail I would suggest ridding Jon and Ponch ala Chips style instead of wasting time on a silly flap
Up here Chips are served with fish - and often with dressing & gravy (not poutine)....or come in a bag with local flavours ....guess your're talking about that gay cop show from the US that was passed off as entertainment ...maybe your parents should have let you watch more educational programming .... (jk).... ala Chips style instead of wasting time on a silly flap