ok. i'm enjoying this game a lot, and have made steady progress since when i bought it at release and didn't realize you could control your options.

however, there's one thing that stands in the way of my getting any decent scores: that goddamned wall at the end of level four that grows back as you shoot it. i've tried keeping options behind me to beat it back, tried clearing it out fast or slow, and used all sorts of option patterns (type one user here) but every time it just pops back and murders me until i scroll out of it.
usually when this kind of thing happens, it's because i'm making the game harder than it has to be and missing some obvious solution. i can't figure out what exactly i'm supposed to do to manage this freaking wall though, and until i do all one credit runs will be ending here. good people of the shmups forum, can you help me out?