Thanks for the comments Bjorn, eph221, and Tom. Glad you liked it.
I suppose I was trying to start 'small' and then build up, making the ending seem a little 'bigger' than if I had constant 'bigness' throughout. In my original mix I thought the drums were a little too soft, and the bass too boomy; the mix I subsequently uploaded had a small notch in the instrument bus around 7k to let the snare ring through, and I lowered the bottom of the bass. Maybe my reference mix was a little bass-shy.