I do not care where the guy get's his PC boards from but lying never makes you look good. When you get caught it just makes you look worse not better.
On the painting parts black, sanding ic's down and the like is really not going to stop anyone. A $13 IC identifier from China off ebay will tell you what it is 99% of the time. If someone wants to put a sticker over it and void warranty if removed or something fine but it never makes one look more professional it always makes someone look petty.
At the end of the day people with the desire and know how to reverse engineer something will never be deterred by something as stupid as painting the parts. sanding them etc....Who cares if Buba knows what IC your using who makes your parts for you. Cobra did not sell any less radio's when people figured out they where not making their own radio's.
I tend to avoid all the drama these builder's and their owners and keydown and Super bowel operators get up too. It reminds of a womens soap opera!!! I have 1, 2 and 3 transistor amplifiers and a few tube amps. None of them have driver's. I can run any of the transistor amps off of any regular production car made in the last 13 years with no modifications to the electrical system no dual batteries, no 350 amp alternator, no Maxwell Super CapsIn fact most car's or trucks made int he last 30 years would be no brainers as long as we rule out ancient Korean/French/Italian car's imported to the USA and the Yugo! LOL
LDMOS is the future and plenty of people are building with them but as far as I know none of these custom builders are using a PCB of their own design they are all using off the shelf parts. The LDMOS transistors are crazy expensive but not when you look at the output and durability. The real issue is that you need to be at 50V minimum 100V even better if you want to see decent gain number's. These things draw insane current at high voltages and that is dangerous especially in a mobile setting. You know Buba does not have his batteries fused and you know these custom builders do not insert a non-user-defeatable fuse inside either. All it takes is one car accident for disaster to strike!
I am picturing hot-glue I mean epoxy built copper clad with an NXP on it running at 100V....LOL