I first created a hole in the bottom of the chassis can, directly under the bearing housing in the dead center of the chassis can, using a hole punch designed for cutting thin metal.
I didn't understand the whole explanation but it seems a delicate job; didn't you fear to do some damage compromising the result?
And the oil did not spill?
Under the engine I know this screw cemented by the factory.
https://i.postimg.cc/T2Vm0Zj8/A.jpg
Wasn't it enough just to adjust the one higher or lower?