Isn't that G&G a ETU gun ????
TBH forget DSG as it is well over rated
I'd just run it on a small 11.1v until the ETU or box craps out then re-do it as a 13:1 short stroke setup on a m115 spring
The motor might be an Orange Ifrit or Blue G&G 25k motor on 13:1 you get near 20 rps on 7.4v if done right or 30rps on 11.1v
(you would really need to know what you are doing and dump the ETU for a proper mosfet)
Resist the DSG temptation BS - a good tweaked SSG will get very good results without a lot of money & hassle if done right
replace the bronzey bushings as they wear quickly - especially under the gears really quick
TBH - just use the gun as it is for a good while until it starts to crap out, the fps - wait until it drops below 300fps or something
too many people - including me, take a working gun and fuck it up trying to upgrade shit
plus a DSG unless you really really walk on water just craps out & destroys itself very quickly
most DIY DSG's instead of firing very quickly, end up just destroying themselves very quickly instead
uae it as is for a good while and stick with a tweaked SSG setup maybe than dream of a DSG