You can make long metal bars with AREdit, a program that can make
extra long (basically infinite) metal, rubber and rocket pieces,
allows you to put nodes in exact places (by coordinates),
have tension greater than +/-100%,
huge (infinite?) level boundaries,
multiple armadillos (and portals,
one portal per dillo),
different sized armadillos,
timers over 60 seconds
materials outside of level boundaries (?)
and other things which I cannot recall at the moment.
Basically it's awesome for cool (hacked) levels. It has been used many times in contests.
What was my point again?
Oh yeah. You can do that, but it also gets rid of points on the "leg" to put your "muscles" if you don't want to put them on the very end of everything.