I am going to go against the flow here.
Hog or DIR rigs have no place in a recreational rescue class. They are designed for specific types of diving, outside the sphere of 'lowest common denominator rec diving'. In my personal oppinion, they are part of the natural progression of a diver, and perhaps should come after rescue class. In many ways I like the PADI system where OW teaches you how to dive, AOW opens your eyes to the types of dive out there, and when you are comfortable in the water go on to rescue, that introduces skills for helping others. Then (to my mind) comes the time to go further, and investigate DIR or Hog rigs, and more technical diving, and to get the relevant training. I would suggest that if the OP has been trained correctly in DIR or hog diving then they should already have the necessary skills that they have no need for a rec. rescue class.
The recreational rescue class is the most fun of the classes that PADI do. It is such fun because there is so much practical work to do. However, this is where having somebody in DIR or hog rig makes things more difficult. If there is only one student with this type of rig, they will have to be paired with a rec rig wearer for many activities, which is not particularly good for the rec student, nor the DIR/hog student. It doubles the instructor workload in many of the exercises as a second demonstration has to be made for everything, explaining the different ways of doing things. Simple things like removing the bcd at the surface are different, and over the period of the class the simple explication of the different skills can seriously increase the time taken to do everything. Now, two DIR/ hog divers together, or even a class full of them would be fine.
Now, I would also suggest that if the OP was not trained in DIR or Hog diving, then simply adopting the kit, and continuing the rec training is not getting the best out of the kit, and should abandon rec training and go to somebody like GUE. Getting training adapted to the gear and style of diving would seem like a good idea, no?
Hog or DIR rigs have no place in a recreational rescue class. They are designed for specific types of diving, outside the sphere of 'lowest common denominator rec diving'. In my personal oppinion, they are part of the natural progression of a diver, and perhaps should come after rescue class. In many ways I like the PADI system where OW teaches you how to dive, AOW opens your eyes to the types of dive out there, and when you are comfortable in the water go on to rescue, that introduces skills for helping others. Then (to my mind) comes the time to go further, and investigate DIR or Hog rigs, and more technical diving, and to get the relevant training. I would suggest that if the OP has been trained correctly in DIR or hog diving then they should already have the necessary skills that they have no need for a rec. rescue class.
The recreational rescue class is the most fun of the classes that PADI do. It is such fun because there is so much practical work to do. However, this is where having somebody in DIR or hog rig makes things more difficult. If there is only one student with this type of rig, they will have to be paired with a rec rig wearer for many activities, which is not particularly good for the rec student, nor the DIR/hog student. It doubles the instructor workload in many of the exercises as a second demonstration has to be made for everything, explaining the different ways of doing things. Simple things like removing the bcd at the surface are different, and over the period of the class the simple explication of the different skills can seriously increase the time taken to do everything. Now, two DIR/ hog divers together, or even a class full of them would be fine.
Now, I would also suggest that if the OP was not trained in DIR or Hog diving, then simply adopting the kit, and continuing the rec training is not getting the best out of the kit, and should abandon rec training and go to somebody like GUE. Getting training adapted to the gear and style of diving would seem like a good idea, no?