*sigh* As a prop maker, I guess this post applies to me, lol. So many jumps, so little time! Thank you for posting these - really liked a lot of them!
What's nice about most of these jumps is that I think they'd be really easy to shrink down to model size. The construction is pretty obvious and wouldn't tax even my somewhat limited woodworking skills. *Sigh* It's exactly like you said--so many jumps, so little time!