I know all this has been covered in the past but I figured that having some of these images here would help with the builds. I don't like searching all over the different forums looking for pictures and such.
One thing that really jumps out at me about the full-size set piece used in ESB is that the sidewalls are much shorter than those on the effects model. Like 2/3 the height. I did some measurements off one of the screenshots and compared it against my MPC kit, and the MPC sidewalls would have to be about HALF their current height to replicate the look of the set piece-- notice how tall Han is in pic 015 compared to the mandible sidewall and then compare the kit's Han "figure" to the sidewall. Big difference.
Another thing I noticed can be clearly seen in pic 010: there ain't nothing even close to a Porsche transmission half on the sidewall of the set piece! Also note the dinky little stick that holds up the laser cannon in that shot. Needless to say, don't let anybody tell you that something on your Millennium Falcon model isn't "accurate" because Falcon accuracy is strictly subjective.