I used to ride trials but have had a change of direction into rallying. Still not popped my cherry but I’ve had the BRP a couple years now. Recently rebuilt the engine to a 680 and am getting close to being race ready!
I hope you have long legs. Once you put the standard wheels back on that will be a tall bike with the under-seat tank. I doubt you will need it though; the front rally tank should be plenty big enough.