Monoprice Product 39306

I am attaching a picture of the back of my TV and Sound Bar showing my tentative positions for attaching the TV wall mount and sound bar mount. My only issue is I have to buy much longer M6 screws to attach the horizontal connecting rod of the wall mount to the TV's 2 bottom VESA holes. Should I be concerned about them pulling out of the TV once I hang it and the sound bar on the wall mount panel?The mount came with M6 25mm screws to attach the connecting rod but even without the small added distance from the TV due to the sound bar bracket they are not even close to being long enough. I will need to get some 2" long to completely seat into the VESA holes on the TV.

So I finally got the tv and sound bar mounted. Probably will end up taking it down because the tv mount takes quite a bit of effort to either lower or raise the tv. I have set the mount resistance to the lowest setting where the tv will not drop to the lowest position due to the combined weight of the tv and sound bar but raising or lowering the mount is still somewhat hard unlike the you tube videos that show people raising/lowering a tv with a finger tip. Until I decide to return the mount I would like to raise the sound bar to flush with the tv bottom but the keyhole studs supplied with the Mounting Dream sound bar mount will not hold the sound bar in place on the mount. Any suggestions for what I can do to secure the sound bar flush to the tv so there is no gap are appreciated.

This saga continues to no end. Here is a list of "wants my wife has for the tv in the main room of the house.
1.Does not want it to sit on a piece of furniture(read stand,entertainment center...basically anything that touches the floor which only leaves a wall mount of some type.
2. The mount needs to allow vertical movement of the tv from a stored(completely up position) to a viewing position where the center of the screen is as close to 42" from the floor as possible,be close to the wall at all times/positions and allow for horizontal(left to right) pivot and up/down tilt of the tv.
My research led me to the conclusion that the only mount that allows for vertical travel is a mount designed for fireplaces with a mantel. I researched and found that Mantel Mount and Monoprice are the two main companies that offer this type of mount. They work exactly as designed but bring the tv into the room a distance of 23" at the lowest vertical position and 27 3/8" at its center position which puts the tv screen way too close for my wife's viewing comfort. Again,the mount is designed to allow the tv to be adjusted out, over and down to clear a mantel so naturally it has to bring the tv into the room towards the viewer to clear the mantel. Is there a mount that allows for vertical travel without the tv screen having to be moved any distance out from the wall to which it is installed?
Thanks