I had the same problem with the front bails with small boots (mine are TLT 6, size 25.5). I have the same problem with Race 290 crampons too. I clamped the bails on a vise on my workbench and bent them to conform more to the shape of the boots and never had problems again. It was not easy to bend them but doable if you have a vise. I didn't know Camp had narrower bails.
I have a pair of Race 290, which is similar to Tour 350 except the bindings, I believe. For what these crampons are intended for (non technical hard snow), 10 points are sufficient for me. I have used 12 points crampons on some of the same terrain and I can't really tell the difference. Sure, when it gets technical, you want steel crampons.