iPhone SE (5/5s/etc) dock for Golf GTI MK7

I really liked the idea of the source dock but it was too big for my phone and I didn't have a right angle cable. But it has a Tinkercad link! I haven't ever used Tinkercad but I'm passably familiar with CAD programs and it seemed pretty straightforward so I rolled up my sleeves and dug in.

Unfortunately I quickly found that Tinkercad and I don't speak the same language. I couldn't find a way to measure the distance from a part to a specific point. It would give me measurements but only o