that "lars family speeder" is awesome. I'm assuming that it does not have a detailed interior since you said it was made as a dio filler? I would love to see what you could do with making it with an opening cockpit and detailed interior...
I have never been able to successfully scratch build much of anything. I got a speeder bike done that came out awesome, but anything more complicated than that I seem to get half way finished with the big stuff and give up when it comes to the small details....