Bar plus is not to stay, I will or BAAE (British Airways Avionic Engineering) Will not be servicing the Bar plus starting this september.
Bar Plus 2 will not be coming to BAAE as they are under warranty, so we wont be touching them anytime soon.
As for putting these things into the oven, I just received one this morning where the components looked like burnt/bbq'ed chips.
They contain LEAD Acid batteries, so you do the thinking.