it would be easy to notch out the tail to make it a swallow tail. but you might have to add a little reinforcement to it. Like maybe lay up some carbon tape extending out each side of the notch on your topsheet. then you have to figure out how you want to seal the cut edge. Which i think any urethane based 2 part epoxy might do.
everything is possible but you have to put some thought into it and its not going to work like a board designed around a swallow tail or block tail if you go that route.
Thanks again CMSbored (Just seen your method idea) I am indeed giving it a lot of thought and a hoping for oodles of advice - I have actually only ever seen one home made powder board briefly years ago when making my own was far from thought.
Just posting that Idea brought a smile to my face. I like thinking outside the box of consumerism (need something? pay pay pay).
I was wondering if anyone has ever tried to change the profile of a board. Lets say an old school pos camber pow board. You could clamp down the base at either binding and wedge something under the tips of the board to keep it in a heavily flexed position. Surely with some time it would turn up the tip into more of a rocker profile. Maybe you'd loose the camber but these days lots of boards are rocking flat between bindings with turned up rockered tips, to good effect (ride, K2).
Of course it has to be a board you are not attached to because you could destroy it.
Still loads of 2nd hand pos camber old school boards out there for cheap these days.