The plastic insert probably melted because it got too close to something hot, duh! (knowing you know this) Take some zip ties and tie them all together. Not only to keep it away from the exhaust side of the turbo, but it will help the vacuum lines from rubbing.
You can make it look real nice, black ones usually look the best and put the heads of them down when theyre snug... Always do this to keep ANYTHING from rubbing together as well. Ive seen so many things get rubbed through on other peoples cars its sick. My friends's o2 sensor connection was resting a little ontop of his transmision cover, over 3 months it ate a good .10-.25 inch piece out of it.
You need to at least change everything so it is set up properly. It looks like you have the SBC-iD and the FBC controlling boost right now which could lead to some interesting consequences.
If I'm not mistaken, the FBC acts as a bleed valve, releasing pressure back into the intake pipe. Right now, you have it set up so that the FBC sees the boost level before the SBC-iD does. I'm not sure what'll happen, but I don't think it'll be good.