I finally got the chance to install the UMI subframe connectors I bought in April
Having a drive on hoist makes it easy, put the car on the hoist, put the rear jack on the frame rails and lift the car till the lower control arms are parallel to the ground.
take off the tunnel brace, put the provided threaded bars in the front frame rails, take out the drivers side rear lower control arm bolt, slide the subframe up in the back and reattach the lower control arm
Loosely attach the front subframe bolts, do the same procedure on the passenger side.