Two Dragon/Sagittarius together is a 95-100% mirror, two cheerful hedonists who each bring the party and now have one continuous party with no one left to host it. Both halves lead by simply having more fun than anybody else in the room. The match is joyful and high-energy. The danger is that two people this carried away can mistake a good time for a good foundation.
Chemistry is warm, generous, and endlessly active. Both Dragon/Sagittarius halves have a heart as big as all outdoors and want a partner who can keep up on the trail, the slope, and the wave. Here each has found that partner. The bedroom is adventurous. The risk the canon flagged is the romantic philanthropist streak: make sure you chose each other out of attraction, not out of generosity.
Talk is upbeat, big-hearted, and relentlessly sunny. Both halves are cheerful to a degree that only a fellow Sagittarius could love, which is convenient, because that is exactly who each of you married. The catch is that two people allergic to gloom may skate past a real problem because naming it would spoil the mood.
Friction comes from the canon's own caution that relationships built on pity never last. When two such soft-hearted optimists avoid the hard conversation to keep things light, small grievances pile up under all that good cheer. Somebody has to be willing to turn the music down and talk.
What each Dragon/Sagittarius needs from the other is a reason to stay when the novelty fades. The canon sends you both to the coast for all-out exercise, so build the relationship the same way you build fitness, on purpose and over time. Channel the shared appetite for adventure into one shared life, and the party finally has a home to come back to.
At 95-100%, this is one of the most joyful and vital pairings the formula scores. Two Dragon/Sagittarius can have the time of their lives together. Just make sure there is something solid underneath all that fun.