Mailbag: Roster reloaded, new questions

With Boston's offseason roster construction nearing completion, we're ripping open the Celtics Mailbag and tackling your letters. Among the topics covered:

* Are the Celtics done adding players to their roster?

* Does the team need another backup ball-handler?

* What are the Celtics doing with the biannual exception?

* Is second-round pick Kris Joseph going to make the roster?

* Who is the team's starting shooting guard when Avery Bradley returns?

Hop HERE to read the Celtics Mailbag.