Pete, Sweetcrisp are very skinny and lanky growers. All those really long skinny branches will either need to be supported with sticks and string or cut way back. A good wind storm can cause havoc on really thin branched cultivars like Sweetcrisp. Ive got a couple young ones, 2 year plants, and to shape them Im tipping new growth at 4 to 6 inches. It really slows the growth down and it forces branching. Anything to slow down sweetcrisp is a plus. The plant grows really fast and Ive noticed when tipping sweetcrisp only some will branch while others send out one shoot and keep growing. By tipping early and often you get more fruit, shorter stronger branches and a more compact plant. If you adopt this approach, try to pinch new growth to outward or up ward facing leaf node. Sweetcrisp tends to have a very spralling growth habit which makes for a lot of cross branching on the interior of the plant. You dont want branches rubbing each other if possible. Sometimes its very hard to avoid with certain varieties.
Bam, nice fruit shot ;-)