I have had some good success topworking my Angie mango to a variety I like better (Maha Chanok) and have improved my grafting skills (see
http://tropicalfruitforum.com/index.php?topic=16712.0 for the thread about that tree).
Next up, I'm going to topwork the Cogshall I planted. How come? I've had trouble getting it to set consistently, and when it does, the fruit are hard to ripen properly (jelly seed, anthracnose etc). Thanks to some great tips from forum members here, I modified my pruning technique, changed my fertilizing strategy, and picked them green and let them ripen on the counter. All of these things produced a good fruit set this year that were greatly improved. But even so, they were still only acceptable, not excellent. They were great smoothy mangos, but still ripen too unevenly to make them great for eating out of hand. The trouble is that the nose and interior near the seed ripens much faster than the stem end. So it is impossible for me to get one fruit to be ripe all at once. Either the nose is overripe and the stem end is perfect, or the nose is perfect and the stem end is underripe. The other factor is that the tree is hard to keep dwarfed. I'm in 9b and need to frost protect, so I am ruthless about maintaining the size of my trees. Here is a picture after pruning last week, when I harvested the last of the fruits:
It is 6' tall after pruning. So for those of you considering a Cogshall, it can be maintained small. Forgot to take a before picture, but I took off approximately 6' of height, taking out large uprights, with thinning cuts removing them where they connect to the main trunk. But it is much easier to control a tree that grows 2-3' a year not 6'! But if I could get the fruit to ripen better, this is in the acceptable range for pruning to stay small.
But based on the ripening issues, I'm going to topwork. I'm considering either Fairchild or Honey Kiss as the new variety. Which would you choose and why?