I have created a model to be 3D printed that requires a threaded hole for screws. I intend to use the "White, Strong, and Flexible" material. According to Shapeways support, this material will not withstand having a screw threaded into it multiple times. Has anyone faced a similar situation? Did you have threaded metal insets which could be plugged into the hole that the screw can be inserted into? Is there another solution to this problem? I'd really appreciate help! Thanks.