the 3d printed multi-outs are really nice i wouldnt do it any other way now. It adds to the cost a bit but its worth it instead of all the cutting you have to do otherwise to get a multi-out installed.
I observed something though. the nintendo-repaired rf toploaders have a replacement motherboard that shifts the ppu way to the left. im almost sure its shifted enough to install a nesrgb without the adapter. there were quite a few made they have a blue sticker on the bottom.
I just missed buying one on ebay. they are something to look out for though.
Ive also noticed that my toploader never need the extra voltage regulator and run cool.
both frontloaders ive left on for a while heats up too much for my liking so ive been putting the regulator in.