Thanks for that squidjuggler.
I've just come off an 11-month isometrics-only regime, which was a lot of fun and kept things toned up and a little stronger, but I'm now working with the strands more and more again, with only a few iso's thrown in from time to time. In fact, most of the iso's now are springs or Hook loops held for 1-2 seconds each rep on the outstretch.
I've picked up the odd chest expander, usually York or its NZ equivalent (identical) and a longer rubber cable set of some Chinese brand.
York 25 inches
Hook with 20" loops about 34 inches
Chinese Terry's replica (but with clips) 26.5 inches
Chinese rubber cable set 30.5 inches
I haven't touched my Elastikon set for a while but I'll probably fit that out with new bungee cord at some stage.
While the training effect cuts in sooner with shorter springsets/loops, there is still a definite use for the longer sets. One exercise which I found was very good was using the Hook loops (20") around the back and pushing straight out in a sort of a "bench press", something which cannot be done with steel springs very well.
The back press out to the side goes better with cables as well, the springs right against the body catching on clothing and skin. Springs for the front pulls though, no trouble there. And curls with the Terry's replica with rotating wooden handles.