Those that have built the Lego Tower Bridge are feeling out-dated because the Brits have updated their historic design!Update yours too, for a fraction of the 1/4 million pounds it cost them.More information here:http://www.dailymail.co.uk/news/article-2165518/London-2012-Olympics-Rings-unveiled-Tower-Bridge.html#ixzz22iJEVr8KThis design is parametric. The attached stl's are the correct scale for the Lego Tower Bridge:http://shop.lego.com/en-US/Tower-Bridge-10214We need a model "Boris" to go with it :-)Print Holder.stl, check fit with a piece of lego, if you need to adjust, alter knob_diameter in block-remix.scad to get that perfect fitPrint RingA.stl in Blue and RedPrint RingB.stl in Green, Yellow and BlackAssemble Olympic rings using acetone and this for a guide: http://www.dailymail.co.uk/news/article-2165518/London-2012-Olympics-Rings-unveiled-Tower-Bridge.htmlAcetone glue to holder