I saw off my apdc+ by .5", back in the days that I was struggling to learn everything. In hindsight it probably doesn't matter with this xtra .5".
The sawing part was easy. Taking off the staples was bloody hard. I used a table saw, conservatively slicing several times to get to .5. Actually it's very easy. It doesn't matter if you miss a few millimeter. You can put back the cap on and stuff it with a few slices of whatever to extend it. The key is to super glue everything back strongly so the racket won't accidentally fly out of your hand. Use ALOT of glue. That's it.