I understand that if an older tree produces lots of fruit in 1 season, the next season is usually a break season. But my tree is 3 years old and last season was not heavy, leading me to think it was my pruning.

I am great at pruning peach trees and know they only fruit on first year wood, and from reading various websites I also read that apricot trees fruit mostly on first year wood and also on established fruiting spurs which develop over a few years (obviously mine dont have these yet).

I have worked on an orchard before so know all the basics. The aim of my pruning was to create an open vase (you can see the 4 leaders). The tree started off being so crowded, so I cut all the competing vigorous uprights out and any cross over branches and ones in the centre. I also cut the little weak shoots out which would collapse with the weight of fruit. When I made cuts, they were on an angle and I am glad to see that new, fresh shoots are emerging from where I made the cuts.

My preference was for horizontal branches from the leaders and some shorter first year upright shoots [ones which were too long (but not too thick and vigorous) got trimmed to about 60cm so that it could support a load of potential fruit]. Would the horizontal branches spur up in the future? I also wanted to limit the size of the tree so that it is manageable.

Is there anything I should have done differently and what should I do in future?

Click the links to see extra images:
1. http://i1309.photobucket.com/albums/s625/bmh48/20140926_103203_zps1b043c04.jpg

2.
http://i1309.photobucket.com/albums/s625/bmh48/20140926_103148_zps71745e7e.jpg

Cheers! :)