Scupper holes for Perception Sundance

Advice
#1

I have a Perception Sundance 12. At the bottom of the seat area, on each side of the seat, there is a place that looks like scupper holes, but of course the holes are not drilled through. Because this yak is so hard to drain when it gets turned over, I was wondering about the possibility of drilling those holes out and putting scupper plugs in them. It looks like one of the Ocean scupper plugs would fit fine. Then if I get water in it close to shore, I could just pull the plugs and let it self drain. Have any of you done that with a sit-in kayak? Is that just the wrong thing to do? Your opinions are welcome…

#2

Drain plug
Why not put an after market drain plug in. That is more water tight.

#3

Aftermarket plug for Sundance
Where would I find those? Would it screw in so it is a tighter fit?

Thanks.

#4

After market drain plug
Where would you place the plug? Should I put it above the water line?