The XRP transmissions are good, as many who have used the recipe given in
this famous CD whitepaper (my own team included) can attest.
But it appears you are tossing out some good plastic parts, or maybe in your haste to get at the transmissions you destroyed plastic parts that might have stayed useful. I've built very handy things using those plastic parts. For example, the plastic handle, with the electronic trigger and battery connector that it houses, can be used to make a nice little motor tester.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)