Hello everybody,
but there is also an easier and above all faster solution, provided one has a quiet hand and a good sense of distance,
which I've tried today.
The strip is clamped between the steel rulers as before. Then I've tackled the support at the upper ends with the tweezer and gently dipped the edge into a flat CA drop, and set it down as centrally as possible on the strip, where it started glueing. For a short moment it is possible to correct the support's seat minimally with the fingernail or tweezer.
Then I have still painted a little bit MEK onto both sides.
Finally I've cut off the front overhang with the slanting edge of the cutter chisel,
and then the rear overhang with the straight cutting edge.
And these are less handgrips than with the previous solution with the cutting compass, so why complicated, if it goes also easier.