Cap is tight already. Goalie market is a different game. max you can get him for at a 2nd round pick comp is 4.2M will Boston pay that for their back up when they are already pushed to their ceiling?
They'll certainly match that, even if it means having to trade a player to fit him under the cap.
All it would do is piss off Boston and potentially mean a retaliatory offer sheet for one of our RFAs down the line.
Only possibility to get him in a Sens jersey would be to offer a salary the Bruins would have a very hard time fitting in, while also putting up a 1st round pick in the deal so they feel if they don't match they'll still get something good in return.