Thanks guys the tank is mounted and I used Voyager's method of doing so . Its fitted snuggly into the tunnel of the fuse and I used CA glue to keep it from sliding back along with foam around it .

spokman ......I wish there was a door on top of the Nextstar but there isnt my freind , which added to the difficulty , me being a newbe to Glow powered planes, of mounting the tank. Thanks anyway .