I prefer riding English and enjoy doing hunter/jumper. I am considering a 15 year old paint gelding for lease and he's been under an English saddle before. The problem is, he's fully spur trained. I laid the reins on his neck, had my hands on my hips, and steered him around with just my legs and butt. He does not stop dead on a dime when you give him the whoa cue but could this sort of thing have a negative impact for doing equitation flat and green hunter? With his age I don't want to do anything over 3 feet.
This is all assuming he LIKES jumping. I've only been on him for about 15 minutes to try him out. I'm bringing an general purpose saddle and a snaffle bit to try him out with direct reining and light contact on his mouth. The curb bit they have for him is pointless since he doesn't need it.