It really comes down to a couple of things. From what I understand the Building Group build is for a building that is intact: without damage and not a ruin. Also the building is pretty much stand alone. The main piece on a suitable base. You also only have 3 months to build it in.
The Super SIG for Market Garden is for any subject related to the title. Be it a tank, a squad of paras at a bridgehead fighting off the 9th and 10th SS panzer divisions. On the other hand it could just be a single figure. In front off a typical Dutch town house. In short any part or all of the battle. You get a whole year to do it in and the house can be any thing from a neat and tidy one or totally blown to bits shell.
Pretty much on the money there Gern. You don't have to stick with one- you can do them all if you want!!!
Only a bit off with the boat. I would actually rather see no Plastic kits. I'm aware that this might put a lot off the idea, but this is an attempt to get some others to have a go at building a boat from a wood or glass fibre "kit" or plan.
I think there are plenty of options for plastic kits in all the others. There is even a GB for sail boats if I remember correct.