I thought I'd introduce a universal luggage system we developed for Classic / Neo / Retro Motorcycles. Our brand is Longride: https://longridebags.com/
And the luggage system is explained here: https://longridebags.com/pages/motorcycle-bags-mounting-system-neo-retro
Our saddlebags are made of full-grain, vegetable tanned leather and a thick waterproof waxed cotton.
We thought it would be interesting to develop a universal system, easy to customise and to adapt to individual bikes. You can see how we fitted it on a Bonneville T120 here for example:
Hope you'll find this product relevant to this forum's them and happy to discuss our bags if you wish!