Just got a pair of x squared which I got quite cheap and I initially thought they needed a tune up as there was quite a bit of movement in the nose bridge. After a good look though I have found that one of the screws on the nose bridge just turns freely. Bit worried now and have dismantled them to find what I suspected. The actual thread but on the orbital is stripped! Has anyone managed to repair this? Can the next sized screw be used in the now larger hole? Panicking a bit at the moment. I bought them on eBay&stupidly gave positive feedback before realising it was more than a tune up needed. Any help much appreciated!