No need to apologise. My replies to your posts take days to appear on this forum possibly because I am a newbie and do not post much.

I am very pleased to see the TX-Power issue has been resolved for you. I do not, so far as I am aware, suffer from random disconnects from my AP. I am not able to test it at the moment as I lent my Ralink 3070 radio to a friend.

For your information I did find that using a Windsurfer Parabolic Reflector made a big difference to performance. See The template I used is here:

I see you apply the mac80211 fragmentation patch. Does the fragmentation attack work for you? You can test it if you have a second wifi radio:

aireplay-ng -9 -i wlan1 wlan0

see the section Attack Tests here: