Beginner Crawler... what can I upgrade on my scx24?

Just picked up my first SCX24 Basecamp... looking to get into crawling. So far this thing is a blast.

I picked up some upgrades as well after my first 2 runs with it. So far I have the Micky Thompson Proline wheels, the Proline Big Bore shocks, and a skidplate for the center.

What other upgrades should I consider?