Willem, as nice this hobby is, the more you read about the franken builds of other members, not only about the Submariner but all other, the more you will recognize when a rep has reached "super" status.
You´ve got a nice Sub but that is just an out of the box solution.
Take your time and read a couple of threads about how people have build their frankens. It is very important to understand the process and what it takes, from who to order what, where to search for parts etc.
It is a knowledge no one can summarize in a post.
I suggest to keep the Sub and to start a forum research, learn from the experience of the members, ask questions ... then start collecting parts for a Super-rep.
A Super-rep is the one you have build with a fair amount of genuine parts, or some modder built for you.
In the sales corner there are some high class sales from time to time, but these are serious budget franken builds, they are hard to sell, because prices are close to a genuine watch and there is a slight psychological barrier that prevents potential buyers from paying that much for a franken watch.
On the other hand when gathering parts for a franken watch, you would be spending a lot as each part gen or aftermarket is expensive and piece by piece it raises the budget very fast.
Before you buy anything more you better research what a certain watch has to look like, like the misaligned rehaut you have for example.
By then you`d know from what parts a certain watch was built from, by only looking at the sales pictures.
Have fun, be very very patient and good luck!