Sorry, I am writing from my smartphone, I can post pictures :/
Quick note before start, you shout consider to no attach the TFT screen when you are test fitting. Its ribbon cable is very fragile.
For the volume wheel, I had this problem in some of my builds, on the back shell near the volume wheel, there is the embose where goes the screw, i have remove a little bit of matter on it side to solve the problem.
For the Dpad, I think you are talking about Jakejm79 solution's, a simple way to check if it work is to try the modification with the grey Dpad you should have receive with your shell.
For the power switch, take a look at https://forum.freeplaytech.com/showthread.php?tid=4520
I have make this modification on all of my builds.
For the shoulder buttons, I have this problem too, the only workaround that is working for me so far is to not tight the middle screws all the way.
For the rubber, I have never try this but you could use kapton tape, nothing is really to stick to it.
Quick note before start, you shout consider to no attach the TFT screen when you are test fitting. Its ribbon cable is very fragile.
For the volume wheel, I had this problem in some of my builds, on the back shell near the volume wheel, there is the embose where goes the screw, i have remove a little bit of matter on it side to solve the problem.
For the Dpad, I think you are talking about Jakejm79 solution's, a simple way to check if it work is to try the modification with the grey Dpad you should have receive with your shell.
For the power switch, take a look at https://forum.freeplaytech.com/showthread.php?tid=4520
I have make this modification on all of my builds.
For the shoulder buttons, I have this problem too, the only workaround that is working for me so far is to not tight the middle screws all the way.
For the rubber, I have never try this but you could use kapton tape, nothing is really to stick to it.