Looking at snagging a spare phone for tinkering and testing mobile operating systems (Lineage, Havoc, etc). If/when I settle on something that I like, I'll likely snag a better or newer device. The OnePlus 3 and 3T appear to be widely compatible with these 3rd party ROMs. They're also have pretty decent hardware specs. Does anyone have experience with either or have feedback (good, bad, or otherwise) as to why I should/should not pick one up for testing?