Got a set of Ralph Double Defence, finding them a bit sensitive off camber. I usually run my tyres with tubes at 40 rear 35 front, but that feels very hard with these tyres so i have gone 35/30 . What are peoples experiences with these DD tyres ?

I always ran normal NN at about 30PSI and that was as low as I could go. The casing was thin so they still gave pretty good grip at that. I now use UST RQs and find that I need to run them at around 20-25PSI. The thicker the casing, the less PSI as the casing will give the tyre support. I would go as low as possible without the tyre squirming and moving around.