Sixers have all the pieces, now comes the tricky part

The Sixers have LeBron James, Joel Embiid, Jaylen Brown and Tyrese Maxey. They also have a season opener against the defending NBA champion Knicks at Madison Square Garden on Tuesday night. That’s a pretty good way to find out where things stand. On paper, Philadelphia has enough star power to compete with anybody in the Eastern Conference. But after three weeks of training camp and preseason games, there are still questions about how all those pieces will fit together. As Adam Aaronson of PhillyVoice detailed in his excellent preseason breakdown, the Sixers have demonstrated some impressive offensive possibilities. They’ve also…