>>9784304No prob. Originally was just going to get some joint packs too, but got a Boxer to check the part and build quality. Ended up liking them, so decided to just get the mecha instead. They don't sell the shoulder assembly separately in part packs. I do like the hinge + ball joint they use, as it gives the arm a lot more range of motion. However, the clutch on a couple of the shoulders are a little weak and the whole shoulder with arm will detach if handled too roughly. Many of the elbow builds use flat clip and pin pieces that seem to work just fine, but so do the ones in pic related.