I think that stripit may have the answer to broken spring issues......carry a spare! In the last 7 or so years I’ve had to replace 3 broken springs on our present 5 er. :M Our unit was full-timed in for 7+ years and had been towed untold thousands of miles prior to our buying it.
I only had the privilege of changing one set out here at home! :( Another was replaced in August in Mesa, Az. in an asphalt parking lot.....very hot is an understatement! :) The most recent, was in a truck stop parking lot, 50 miles south of Lincoln, Ne. on a low temperature record setting March morning. Brrrrr! I had to go to Lincoln for a spring replacement. I bought two spring packs while there.....still carrying the spare spring pack in the back of the truck. Having an available spare , may stop the breakage! memtb