i must say very nice job on the motor brace but having only 2 fixing points [ rivets ] is not enough. if this was made in a box type section and fitted with say 4 x rivets [ 2 top and 2 bottom the strength would be much better. with the latest model Vipers they have added fibreglass cloth around the front and side outer fuse engine area plus f/glass to the inner mount and tank bay, what i now do for more strength is epoxy the front top hatch on then pin all 4 sides with 2 x 1/8th cane squers [ total 8 ] then finish with a wrap of light glass cloth , this has proven great strength with running Profi and Nelson engines from other club members .