Finally got around to it... TVP's cut to allow horizontal battery placement:
Batteries inserted:
They protrude 2 - 2½ cm to the sides:
Im thinking that two vertical straps going from the skid plate to the TVP might be the best way to secure the bats...
Another idea is a "gorilla style" strap going from the front of the cut out to the end. It should push the batteries inwards and against the U-shaped dog bone guard.
Need a bit of counter sinking, final servo placement, wireing and a custom dogbone... then Im good to go :)
Ohh... also need to drill the side holes in the CD mount and thread them... 12 m3 screws should hopefully do it!?