'71 Sidestand
There's no question the '71 sidestand was a problem and if you ride your Norton daily, it ought to be removed or 'fixed' ('72 style).
However, if you're a purist and want to retain the original '71 sidestand but still keep it on the bike safely, there is a way. It doesn't cost anything but some time.
Drill and tap the sidestand bushing at the back (opposite the leg) for a 3/16" set screw.
Put the sidestand on the post snugly in place and insert a scribe through the new set screw hole to mark the post all the way around.
Remove the sidestand and machine a groove (by hand) completely around the post so that, when installed, the set screw will sit into the groove. If you can find and use a set screw with a post, that's even better and it's easier to make the groove.
Replace the stand and insert the set screw. Locktite the set screw in place. Install the c-clip which is now redundant.
This setup is almost undetectable during shows yet will prevent the stand from falling off. If you fill the hole with some body filler and paint it, it is completely gone. Now the bike is 100% original 1971 - but safe too.
If you like this idea, all you need to know is how to make the groove. There are a few different ways - some good, some not so good.