For anybody who has some time to kill and appreciates good modelling, there are a number of turnbuckles/turn barrels/screw shackles to be found HERE,
Bernhard's gondolas defy description! At first I couldn't believe they were HO scale. To tell the truth, they kind of took the wind out of my sails because my work is so crude by comparison. OH well, time to haul on the boot straps again!
Thanks for the link!