Ok so what do I mean bad engineering. If you look at the pic with the cockpit (over did the dirt I know. Was trying to make it show more on the little 1/72) you can see one side of the fuselage. There are no guides whatsoever for the cockpit to go, or for the control panel. There is a vague arrow in the instructions that points to area. Dry fitting? almost impossible as there is nothing to hold the piece in place as you test. Is the control panel in place properly? No idea. I had to guess. As these were both resin you also have to use super glue so I had 1 freaking shot only to get it right. I's amazed to have got it as close as I did.
Some sanding to smooth it out a little. Might have escaped using putty so far. Have to add a glass panel underneath which doesn't quite fit.
As much as I like the subject matter Special Hobby does its hard to recommend. The basic annoyances that could be eliminated with a bit more care on their part and the cost make it hard to recommend it.