I have these NASA and Creation NES clones that are PAL 50Hz and I want to mod them to NTSC 60Hz. From what I've read, it's possible to convert a PAL NES to NTSC by swapping out the CPU, PPU and crystal oscillator for the NTSC equivalent from a US NES or Famicom. Does that apply to these NES clones? They do have cloned CPU and PPU (TA-02NP, TA-03NP1, UA6538, UA6527P).