Never tried them together, but I've used both at length. I can't imagine them being a bad pairing. The T1 is mostly neutral, but imparts a warmish midrange undertone, and very good bass control. The UERM's "weak spot" is in the bass, so perhaps it'll help even things out. However, the T1 has fixed 3x gain, so it's a bit loud for an IEM as sensitive as the UERM. Try toning down the source volume first.
Great. Looks like that will be my next move. Get the UERM