Chin-wield with regular red dots (not EOtech) is very possible, and you can definitely get a cheek wield with a micro aimpoint. Also I can change the mags on my Type 97 faster than any of the videos I have seen on youtube. And it's actually harder to change the mags on the Real Sword airsoft since the mags don't drop free. I'd make a video but I'd probably need a friend to record it. But basically all you do is to keep the gun pointed at the target with your right hand, body facing the target before grabbing a fresh mag. You use your left arm and move it as if you are crossing your arm with the elbow facing the target. You hold the fresh mag against the right side of the empty mag and move you fingers so you are grabbing both mags. Using your index finger, press the mag release and pull down. Then you simply drop the empty mag and insert the new mag or if you are retaining the mag, simply inserting the new mag, sliding your hand down the new mag while with your fingertips holding the old mag till your hand clears it. After that you can toss it in a drop pouch or in an empty mag pouch. The whole time your right hand gripping the pistol grip does not move at all.
I know it sounds complicated, but once I got enough practice in, I am now able to reload at 1.2x the speed of my AR-15. If I ever get the time to video record it, I'll definitely post it up.
Cheers!