The transmission mount is now finished so the engine and trans are 100% in the chassis.
Here is what it took to finish it off.
Start by cutting out some 5mm thick flat bar and drilling a hole for the trans mounts.
Get them in position resting against the tube, make sure everything is lined up with the laser pointer.
Put a few tack welds on them to hold the position then remove the crossmember for welding.
Make some gussets from 3mm steel using CAD
Drill a couple of holes to add lightness
Weld it all together
Some paint
and reinstall back on the car. The total weight was only 1.5kg
and a video to celebrate this milestone