Right, just need to break up the flow for a moment, sorry. For those of you that have the time and the inclination, here are a collection of Youtube vids that show applications that fit both Shotokan and KKW TKD Poomsae. I've collected these over a number of months investigating the relationship between the 2 arts. Enjoy. If anything's not clear, let me know.
Those of you familiar with the Taegeuk Poomsae and the KKW Yudanja Poomsae will recognise applications for Jebipoom Mokchigi from Taegeuk Sa Jang, The final backfist and return to Joonbi from Taegeuk O Jang, Keumgang Makki, Uppercut, Side Punch from Taebaek, and Low Block Punch from Taegeuk Il Jang in this Shorin-Ryu bunkai collection:
Some further thoughts on Keumgang Makki from Taebaek can be seen in the following bunkai collection from Shotokan, Heian Nidan. Also in this clip is an application for the side kick / side fist from Taegeuk O Jang. If the height of the side kick is dropped to attack the rear leg kneecap or modified as a snap kick to the groin, the side fist distance is right for the head. Also in the clip are the opening moves of Sa Jang, twin knife hand block, covered spear hand thrust, as a twin wrist grab release:
Here at 1:40 is an interesting application for double scissor block from Taegeuk Chil Jang, which also appears in the Shotokan Kata, Jion. With this technique, a lot of how you can apply it depends on the angle you take to the attack. I’ve also seen this convert to a chicken wing lock on the second scissor (I think from Stuart who’s posting here!), a technique which requires less deviation from the Poomsae:
In Shotokan’s Heian Godan at 4:50 in this video, you’ll recognise the side backfist/target crescent kick/target elbow strike combination. I favour the crescent kick replaced with a leg sweep, which brings the back of the opponents head down perfectly to the height of the target elbow. Nobody says we have to kick high for SD. A target elbow to the back of the head also lends itself joyously easily to replacing with or following up with a rear naked choke:
1:25 this time for Shotokan’s Heian Yodan illustrating an application that’s fairly easily adapted to Taegeuk Chil Jang’s wedging block / knee strike / twin upset combination:
Although my favourite application for that sequence is using the wedging block between the punch and the neck, knee risking to solar plexus, which causes the opponent to bend forward. Then using the twin upset and low X block as a collar grab (the forward motion of the upset representing the reach under the opponent’s chest) and sliding lapel strangle (bringing the hands holding the dobok collar up to the back of the prone opponent’s neck and pressing down to cut of the blood supply). Works well, and I’ve never liked X blocks as blocks

. Here’s the Gi Choke I’m referring to:
Vince Morris covers the cat stance twin knife hand from Pal Jang:
Shotokan’s Kanku Dai, illustrating a possible application for the turn / High Middle Block / Punch combination from Taegeuk Yuk Jang. See 5:04:
Recurring ‘side kick with side hammer blow’ followed by target elbow strike from O Jang, Tae Baek, Pyong Won. Side hammer blow possibly = held wrist of opponent, meaning that the target elbow strike could be to the elbow of the opponent as a joint break or elbow control to ground. The target hand never opens, as it is holding the grab, but the grip of this hand changes in a similar way. See Heian Yodan, 1:00 for a demonstration:
This side hammer blow can also be interpreted as a blocking action to the opponent’s punch, simultaneous with a side kick to the ribs, followed by a scoot in, target elbow to the same area. See Shotokan’s Kanku-dai 3:12, where this motion is used twice in succession quite effectively, once inside the arm and once outside, with a low side kick and target elbow to the back of the head. Vicious:
At 2:30 in the same video, we can see a possible application for Koryo’s Spear hand groin strike followed by pulling back to short stance low block. Groin strike, chamber hand is blocking to the outside of the attacker’s punch. After the strike, the striking hand is moved to the outside of the attacker’s lead leg for a throw, lifting the leg whilst the other arm performs the low block action across the opponent’s neck.
Keum Gang’s back spinning Large Hinges. A method to practice the stepping and wrist turning actions required for a gooseneck wristlock (for example from a collar grab) with an elbow control to ground. This would be based around a wrist grab. See Heian Godan, 1:00
By the way, I'm not saying these ARE the applications, I'm saying they COULD BE. Even when you want them to be, it takes a lot of work to make some of them viable as SD.