BTW, trail riding =/= XC and it's a pet peeve of mine when people think they're equivalent.
Me too- I know someone who thinks XC is the same as Steeplechase
If the horse can jump safely and still be sound, then lower levels should be fine. Not much galloping going on...
If the horse can gallop soundly, then go for it. Just make sure you horse likes it's job too.
I just thought of something... there is a jump called Trakehner and a horse... Hopefully your horse will like that jump more than mine does