My side stand is made for a 1" tube, but the frame is only 7/8". The bit of metal used to fill the gap didn't work, partly because the clamp had been done up much too tight and is badly distorted. I took the stand off the bike. The centre stand is not the right one and is too short; on level ground the bike doesn't fall over, but both tyres are on the ground. It's also hard to get the bike on and off the stand. I'm planning to make it longer and to weld a foot lever for it, made from the remains of the old stand that the previous owner gave me. Good stands make so much difference.
Thanks for the kind words about my M33. It was easy to start, but has become more difficult over the past 250-300 miles. I shall look at it again this weekend. It is very happy at 50 mph, but doesn't mind 55 mph on main roads.