Proto are a great UK vendor, I get quite a few things from them.
And yeah, completely get what you mean about wanting to experiment with lubing/filming switches before putting them into a board. I also find that only certain switches need switch films, I do think the majority of switches will benefit from your own lube vs. factory lube but the availability and quality we have now vs. a few years ago is great and it's mostly down to personal preference in terms of feel and noise.
Neo75 has been lovely to use for the past few days, tempted to swap away from split backspace and go for a more traditional backspace structure with 'Delete' replacing 'Print' in my fair right stack. I've used it for gaming as well the last few nights which I wasn't really planning to do but it's actually been great! Not as immediately responsive compared to the Wooting but the sound & feel is leagues above.
Anything competitive I'll still swap to the Wooting board but for now I'm pretty happy keeping the Neo on my desk as my main board.