About this 3D model

I was looking for the effective joint parts. A good item for the plastic model kit is being sold by Japanese maker. -Wave http://www.hobby-wave.com/LINE_UP/optionsystem/index.html -Kotobukiya http://www.kotobukiya.co.jp/item/page/parts/index_poly.shtml -Yellow Submarine http://ys-hobby.shop-pro.jp/?mode=cate&cbid=182565&csid=7 These items has some types, size and length, shape. There are various types of these items. There keeps strongly. However, the only problem is a high cost! XD