I've no knowledge on the dna200 mods,but can happily reccomend wayne,ive used him many times hes a good egg. Toby has a good rep too. @Huggett might be useful guy to speak to
Having watched Todds review on the Foggatti DNA200 I'd buy one of those - very clean machinery and build quality seems to be almost an art ... Not sure about the ones you mention as they seem difficult to find ... Surely not cheap though ...
They are both circa £140-150, but I was debating importing a max amps 1850mah which should fit in either of those mods with room to spare - so the price is probably more near the £180 mark
I've dealt with Wayne. He replaced a frazzled yihi sx chip for me in a custom box (from elsewhere). Great guy to deal with, and reasonably priced too. [emoji106][emoji2]
tattu is the "quad copter" brand from Gens Ace - Gens Ace are top notch in RC helicopters and general RC - so not sure what you are on about ...
the cons are all weight related - 75C - not really just calculate for yourself what 75C would require with regards to AMPs - but they surely are good 45-50C ...