Its all craftwork from here.
I like your grasp on a lot of key things in this are of composition. Your set up is good, and I like how you brought it around again in the end. Your use of percussion to help accent the rhythm you set up with the string section works! There are some things I do want to bring to your attention in hopes it will encourage you to even greater heights.
The big thing that I and everyone else I know is always striving to improve is the middle section. You are getting there by cutting out the percussion to add emphasis, but it is not building up to a climax (or at least I am not feeling it come at me before you start taking it out). You are already using volume to help, I might recommend also using register changes, or taking the melody you introduced in the larger sections and flesh it out more in the middle.
Keep it up!