Some tips for trials?

Hi there, i have been unicycling for almost 4 months now and have a nimbus 24" muni and I love it but I want to start trials etc.

The problem I find with my unicycle is that it is hard to jump high as the seat cannot go down very low. I need some tips for being able to jump higher; do I need to ride with the seat out in front or something?

Also I am thinking of getting a trials uni as I think it will be easier and lighter, can you recommend one; do you think I should get the cheapest one I can find or a kris holm or something (the 2007 edition which is about £250)

Thanks and sorry for the bad grammer, i’m a bit retarded.

Cut your seatpost and learn to jump at least onto objects as high as a trials wheel before you bother with SIF.