The next Apple Watch Ultra will feature a more lightweight design than its predecessor, according to a new rumor from a leaker with a short but solid record for Apple insights. How will Apple lighten things up? A previous rumor suggested Apple is substituting some of the Ultra 2's titanium mechanical parts for 3D-printed counterparts, which could account for the lighter weight. Setsuna Digital previously leaked Apple's plans for a banana-yellow iPhone 14. Now the leaker is posting on Chinese social media site Weibo that the Apple Watch Ultra 2 has "reduced weight" when compared to the original Ultra model….