Graysmith, on 01 November 2012 - 05:57 PM, said:
• Can’t attach a 2x2 plate (3022) or a 2x2 plate with 1 knob (87580) to the top of a barrel (2489). In fact, I tried a whole bunch of bricks and plates, and round ones were the only ones that could be attached. Bug or a limitation of the software?
Question. are you supposed to be able to connect a 2x2 plate ontop of the barell IRL (i.e. is it used in any official set or so)?
Gnac, on 04 November 2012 - 06:02 PM, said:
This grey fullwidth technic beam cannot be inserted into the gap between the halfwidth black technic beams, due to a conflict which seems to affect modified connector peg parts 6558, 32054 and 32556.
Unfortunately, some official instructions rely on a connection like this. I encountered it while trying to attach the fork for the motorbike model in set 4404 - Land Busters.
Like legolijntje said - it's an illegal design, because the ridges on the pegs (not visible in LDD, but have a look on a real peg) would cause the peg to be in constant compression. This in turn would cause plastic deformation (aka
cold flow) that over time would ruin the peg (it would become loose and less "snappy").