RE: Jamara 330L
Photo one shews the original engine box with the MVVS 45 in place, photo two shews the mods needed to fit the engine in black and the extended holes for the mixture screws, I would suggest that an aluminium angle is bolted in place behind the bulkhead to increase the rigidity of the front and to give some material for the bolts to bear up against, also a few carbon tows around the outside of the box at the engine mounting plate would not go amiss.
Third photo shews the new motor box beside the original for a size comparison note ali angles and tiangular reinforcements.
Mike
EDIT: one other thing when you mount the MVVS the thrust lines on the motor box will not apply anymore as they are set for a DA50 or similar, do it this way up end the fus and stand it on the tail before you attach the rudder prefably, attach engine to mounting box and place on the front bulkhead, put front cowl on too the plane and adjust motor position to suit the front opening, without moving the engine remove the cowl and mark position of the engine box, then proceed as the manual, the hole for the cannister muffler needs to be drilled prior to fitting the engine box, if you are using the MTW 75K the hole needs to be 75 too 80mm in dia in line with the engine exhast outlet for a zero drop manifold, this will allow the cannister to fit over the top of the UC formers and in front of the wing spar tube.
Hope this helps, please ask if you require more information.
Mike