I don't like it...every time you disconnect that line, you have to replace the o-rings...so for a D&F, you're replacing the o-rings? And if you're off by 200 ml (which is likely...mine drains slightly differently each time), then what, you're going to pull the cooler hose again?
Just get a $1.99 funnel that's got a long and flexible tube on it, keep it clean use it only for this...
And for the 6 speed (which should be discussed in another forum), those transmissions have very specific fill/level check procedures...very specific...so, without a dipstick, why would you be adding fluid unless you followed those procedures?? Incidentally, this is true for lots of late-model cars, they have sealed transmissions...
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (90K, Michelin AS3, M1 0W40)
2002 V70-XC (216K, AltiMax RT43, Castrol Edge 0W40)
2002 V70-T5 (186K, IPD bars, Bilsteins, Contis, Mobil 1 0W30)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)