I have been experimenting a bit in light of the widening interval problem (which was not really fixed by tuning ot the top end). Having used a Bach 6 for a long time (which is really a V shaped cup) I decided to try a 5MV. This has been a bit of a revelation. Out of the box it pushed the intervals closer together and gives a very fluid and easy attack, there is also plenty of lip room. It could do with a wider rim for comfort. Having looked at the Kanstul comparator it seems that other people might have had the same idea as there is a Mohan 7P listed which is similar cup shape but with a wider rim. I am going to see how it goes and if I continue to like it I will try and get a custom one made with a wider rim.