I happened to use the credenza 13 object last week and it's fine as long as you use the default two shutters. However, as soon as you extend it and add another pair of shutters, the handles start disappearing into the woodwork... The same thing happens with the v.12 part. Haven't got v.11 installed so can't check that one.
Attached is a picture of how it looks with six shutters. The handles at the right are in the correct position, the middle pair of handles are half embedded and the left pair of handles are completely buried behind the shutter.
Tried going through the code but it was a little too complex for my basic GDL skills and it might well be a problem with one of the macros anyway... maybe an incorrect ADD statement?
Compared it with the object from AC-10 which seems to work properly. However the part seems to have been rewritten so I couldn't just substitute the erroneous portion of the 3D script.
Anyone willing to take a shot at correcting it? 😉