Finally found out where I hid the 10-speed, long-cage SRAM X0 derailleur I've been wanting to use to replace the chain-jamming, mid-cage Rival derailleur on my Catrike Speed. Removed the Rival derailleur and threw it in a box that already contained two exploded Rival derailleurs. I like the performance of the Rival, except on those rare occasions when I downshift to the big cog and they jamb the chain and explode (Yes, the limit screws were properly set, but the chain wrap capacity was exceeded by 2T). The X0 performed great on the test stand. Hope it will stop the chain jamming. Kind of embarrassing to make a group of riders wait, while you and a buddy spend 25 minutes extracting a chain from between the cassette and wheel. Even worse when you are stranded, due to a derailleur explosion. Now, all I have to do is straighten the rear wheel the jammed chain pulled out of alignment, and the Speed will be ready for this months RBM recumbent ride.
Had to install a Jagwire in-line cable housing adjuster, since neither the TT-500 bar end shifter nor the X0 derailleur have built-in adjusters. Really like the direct, no-loop cable housing path.
As I was cleaning the X0 derailleur, prior to installing it, noticed the idler wheel had a through crack. The derailleur has very low mileage on it, so was surprised to see it. Replaced it with a cartridge bearing idler from an exploded Rival derailleur.