Stuck on bootloader in CM12.1 builds

Hi everyone, so I've been trying to compile CM12.1 for the G3 for a while now, and I got a few builds (some with no customizations, some with ArchiDroid, some with just Linaro) but none of them get past the bootloader (LG screen). I've been using TheMuppet's GitHub repository for the device blobs. Here's my roomservice.xml for the most basic build (I figure I should get this working first and then try modifying things):

Code:

---

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <project name="CyanogenMod/android_device_lge_d855" path="device/lge/d855" remote="github" />
  <project name="CyanogenMod/android_device_lge_g3-common" path="device/lge/g3-common" remote="github" />
  <project name="CyanogenMod/android_kernel_lge_g3" path="kernel/lge/g3" remote="github" />
  <project name="CyanogenMod/android_device_qcom_common" path="device/qcom/common" remote="github" />

  <project name="TheMuppets/proprietary_vendor_lge" path="proprietary/vendor/lge" remote="github" revision="cm-12.1" />
</manifest>

---

I thought maybe it was the kernel so I tried flashing 777Kernel, which I use normally on CM based ROMs, but had the same issue. I tried bumping the boot image that it was built with, even though CM merged the open_bump script into their release tools for the G3, and the script returned "Image already bumped" so I don't believe that's an issue either.

I can't get any real log since it doesn't get past the bootloader. Anyone have ideas?
Thanks!