Job done and tested. Done a small plastic bit to replace the initial top battery cover, not the prettiest as i am limited now on tools to and work space but it does the job. Also added a small plastic bit to stop the back cover from "clicking" ... DNA75 running an 18650 . @Rob
I'm absolutely THRILLED with this now @KytanDale and honestly cannot thank you enough for all the hard work you have carried out for me and for going that extra mile for me to add the finishing touches.