Here are some pics of my DIY swallowtail job on my 172 supermodel.
Basically I cut it with a jig saw, cut the wood core back about 5mm between the top and bottom layers and filled the gap with flexible urethane.
It has turned my old board into an insane pow stick for under $50, cant wait to test it out in japan!
Wow, amazing. But what are you going to achieve now having a bit slit in the back of you board
With the swallow tail the surface area of the tail is much less than that of the nose so I can have my stance centred in relation to the sidecut radius for a well setup board on the groomers but still dominate in the pow. I am going to hokkaido in 19 days so it will definitely get a good workout.
Well it worked a treat. The swallow tail allows you to dodge trees like nothing else.
I did not mention the urethane I used before as it was untested but it stood up to temps of around -13c and did not crack or delaminate. This is what I used.
It takes 48 hours to cure and is very runny for about the first 4 hours, you need to mask up the top and bottom sheets of your board, let the tape overhang the edge by about 10mm and fill the gap, because it is very runny you can only do small sections at a time as it must be kept level to avoid it all running off the edge. I ended up doing about 3 layers and grinding it back once dried using a flap disc/angle grinder.
It is a bit of stuffing around but it did work flawlessly, there may be better methods, i am just telling how it worked for me.