Quote:
Originally Posted by Jared Russell
HTD and GT2 belts won't stretch by a noticeable amount. Once you have the right C-C spacing, you should never need to touch it again. That said, a tensioning method may make assembly and achieving proper C-C spacing a bit more forgiving.
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I'd echo this as well. The WCP belt C-C calculator works well. However, we made the mistake of not being able to install it with slack and add tension. We just did exact C-C plus a couple thou, so getting the pulley and wheel assemblies on we're a bit of a struggle.