The metronome trains you only to rely on a external source of setting the rhythm/tempo. It can't develop these skills for you. Keeping up with it or slowing down to stay with it is forcing you to make a ton of minor corrections just to keep step with a machine. That is no way to learn how to play music. There is no interaction going on. All it can do is, at best, show you what needs attention, but it can't give you that attention. It is like using a crutch to walk with when all your legs need is a bit of exercise. I'm keeping on with this because you are a well-known musician and there may be people who therefore think your advice with regard to metronomes is good advice, and I don't think it is. If you have faults with rhythm or in keeping tempo the first step is to recognise that you have a problem. You can help yourself by listening to yourself in recordings or getting a friend to listen to you and discuss. Once you know what the problem is you're halfway to solving it, but you solve it only with people, because it is only with people that you will be playing music with. Playing with a metronome will make you a virtuoso at playing with a metronome. You may be disappointed to find that this in no way translates into playing well with real people. Been there, done it, got the...