Ok, what about the Bright Box 2 that has good specs maybe I should try with one of those?
This starts to wander off-topic for this thread, but: when considering a model with no existing support it really depends what resources you can bring to it (patience/time/money/skills/kit). Some SoCs apparently in that family (EEBB2 has BCM63368, Inteno DG301B has BCM63268) have been OpenWrt-ed but sometimes a single digit can actually mean a wildly different SoC (Broadcom almost never releases any docs on anything).
Personally since there doesn't seem to be much of a price difference, in the UK buying-castoff-CPE category I currently favor the BT HomeHub 5 (~£13 delivered with a little eBay patience; decent grunt, gig ethernet, decent flash space/memory), but the installation process does currently require some fine-pitch soldering which might not be your cup of tea, it requires OpenWrt from trunk, and there are still some slightly rough edges.
I dont mind getting on of those and having a go or trying on the Bright Box 1.
If your (vertical/standing) EEBB1 will otherwise gather dust and you've nothing to lose by trying, sure. It seems worth at least documenting what's inside the case, even just to get a board ID (and especially just in case it's actually the same board). Usually the worst case is that you determine it'd be too much work, and maybe break a clip or lose a screw so it doesn't go back together as neatly. Beyond that, again consider patience/time/money/skills/kit. This forum never promises anything, and there are limits to how much help you can ever expect when you're the only motivated person with a unit actually in your hands (which is why lots of folks wanting support offer to mail a spare to a more techie person). But if you have some energy, go for it; anything I've learned about this stuff I've learned just by getting stuck in and trying it. Typically the ability to fix stuff you break is directly proportional to motivation. And even if you don't finish, any partial documentation you leave for the next person leaves the ecosystem better than you found it.
The brightbox (AR7516) theyre around a tenner now for a new one so pretty good price I think so I got one.
Should be ~£4 on eBay delivered, if you can be bothered to bid on many until you win one.