Unless they're using different parts to build the same sub, which they're obviously not, then all they need to do is measure one and post up the t/s. Hand built or not, you can still post up t/s after building a woofer that's going to be built the same way every time.One of my friends said they don't post them because they hand build each woofer and truly don't know the TS parameters.
No they won't. They just referred me to PWK.the box designer at DD will design one for you if you ask