What about replacing the tape measure with a metal slinky? At least you get the added bonus of linear loading.
About that linear loading, is that really an advantage?
A physical quarter wave radiator is going to perform better than a shortened antenna regardless the type of loading (distributed or lumped), and I recall reading that a physically short antenna performs better with a high-Q lumped loading coil, than a distributed lower-Q linear loading coil. At least that what some people claimed after analyzing 160-meter and below short antennas.
This is probably based on practical implementation factors, and not theoretical ideal elements. Also isn't the radiation pattern a factor? I believe that as you shorten the radiator the pattern become more isotropic, which is probably why a loaded short vertical (even with zero-loss loading) won't perform as well as a full-length radiator (assuming you want low-angle radiation).
Me, I usually just hang a dipole between two trees, or the house and a tree, trim it a bit as needed, and call it good. It's usually not aiming exactly where I think I want, but that's OK, I don't usually care who I talk to.