I have only tip pruned these 3-4 year old trees. The fruit is very good plus look at the low squat shape-structure. Makes them container suitable and for cramped situations and when you need to keep the tree low for a PVC frost protection structure
If you have NDM photos please post them too!
my NDM #4 in front yard

my NDM #4 in front yard (again)

my NDM #4 in side yard

Sweet Tart tree growing in a distorted way. There is another tree shading it but now I don't think this is the entire reason. I got 30 fruits in 2014

mailbox flowers. They arrived there all by themselves. I never planted them.

Very nice shape on this grafted mango tree...the scions came from a neighborhood unknown type tree. It makes small green-yellow fruits so probably minimal theft even though it is 6' from the road
__________ on the NDM front yard photos that is Coc mango just to the right supported by white wood cross anchored in cement and Carrie mango in the background