My cello concerto#1 not finished first movement. Please listen tell me what u think

Of course I'm very thankful for this site but I would like to know how to put my sampled sounds from elsewhere to use since this cello sound here is not my favorite. This is where it is at now. Have been so busy with an opera ,some piano preludes occasioned by the London riots and a nother violin concerto havent had time to notate much on here but here is my CELLO Concerto as it stands now. Very jazzy and Messiaen harmonies needs more percussion!