ah, nice, good to have that sorted.
so mine arrived today and i decided to take another look at things.
So it turns out that the SCTE 3.0 is still using SAE/Imperial screws for all of its parts.
The TT pro? Well, thats metric of course. So any part you upgrade to, that has a thread, and is intended for the SCTE, could be problematic in this way.
My solution was more rough, i slowly drove the metric screw into the imperial hole in and out about 10x. Eventually, the softer alloy reformed to now be a metric thread. Managed to get it all going.
Anyway, I registered to post this and got a lot of value out of the thread so, hi!
Really enjoying the TT pro. Only mod so far is the relocation of the receiver further back, so it doesn't get covered in dirt from the front wheels so much, and now the addition of a really nice servo and horn, which are much faster than the original. Very pleased