Welcome aboard, nerpissad!
If I just add my opinion, I would say that you should try to improve your soldering skills, particularly to avoid solder blobs; when you do a new soldering, always let the iron 2-3 seconds on both the soldering point and the component lead, or wire, the solder will flow on both and will make a good contact. In a tube amp, there is many heat and after some time, bad solders will start to cause problems (buzz, cracks, and so on...).
on stranded wire (those coming out of the transformers, for example), you should twist the end and slightly solder it, to avoid arcing, bad solder or other future problems. Try to keep signal wires as short and neat as possible,
OK, these are just some guidances I can give to you; no bad intention or critics,I just wanted to help.
Good luck for the rest of your build, take your time and ENJOY it; these ST70 are gems!!