I'm currently working on building AMT's Y-wing kit (about 1/72 by the look of it, though there is no scale on the box).
It's nearly finished though, I've painted the base coat of white and just need to do the details, squadron colours + weathering, so it's too late for the GB. Still, I'll post some pics when it's finished, if anyone's interested.
However I have a MUCH bigger Y-wing project planned.. not a complete scratchbuild though (though it will
have some scratchbuilt parts) - you'll see what I'm talking about when it's done...
It might be a while till I actually get started on building it though (I really need to finish the X-Wing first) but
maybe this will be in time for the GB! I'll certainly use Hatewall's drawings as a reference guide.