Every Tank I buy I strip out the interior and superglue a sheet of "Velcro" to the floor of the Tank then a patch of "Velcro"is glued to the base of the Control board , the Smoker and the Battery and anything else that would usually be glued or screwed in place,
This allows you to move or remove anything in the Tank without all the aggravation,
and of course nothing moves unless you move it,
It also saves a lot of otherwise wasted space.
I long ago discarded the screws used to hold the Body to the Hull of my PZ4s and instead use "Countersunk Neo-Dymiun Magnets which I screw onto the internal fixing towers at the front of the Tank and at the rear,
I do not recommend gluing the magnets in place as they will soon pull out,
You will have to shorten the towers and it is a case of trimming until it is right. but once it is done you will wonder why it isn't a standard fit.
Shaun.