I will have to ask the devs about using there tweaks but if I get the all clear and a couple ?'s (see below) answered I plan on updating my DFT based ROM to Tango soon, although mine will be a little more vanilla.
1.) Could you please explain what needs to be done to get CSC's working on DFT based ROM's or is it not possible? I've just bypassed the whole first boot thing in my DFT variant by cooking the info into the ROM.
2.) How is ultrashot's full unlock different from DFT's? Same with XBLA unlock and XAP install?
3.) Does your ROM allow for diagnosis to be installed via ##634# or is it broken like in DFT ROM's? If it's not broken how did you fix it?
EDIT: I was digging through your ROM (hope you don't mind) and I noticed some small errors. In IMGFS\OEM\SEC_MANGO_OS_APPS\mpap_SEC_MANGO_OS_APPS_01.provxml you are installing CBSetting twice. Then in IMGFS\OEM\CSCPackage\mpap_SecCetusOs_CSC_DTM.provxml you install Extra Settings, High Fidelity Position, CBSetting, and AllShare again also. Just extra stuff going on at first boot/hard reset that doesn't need to. Then the last thing I noticed was in IMGFS\OEM\PkgOem_ActiveSyncName\3358126a-019c-4de3-8875-0441f71d7a7d.rgu it has "DeviceManufacturer"="HTC" and "DeviceModel"="7 Mozart" probably never got changed when pulled from ultrashot's ROM should be "SAMSUNG" and "OMNIA 7" respectively.