During an alignment, you should start at m1 and ensure the tube is in the proper resonance or mode… Check the TEM00 mode, if it’s not right it will never align properly.
I cut out targets out of watercolor paper, so I don’t have to deal with tape adhesive, plus you can evaluate the mark after you remove it from the machine.
The way you’re doing it, once removed, you can’t tell where it was.
Check it’s mode and let us know.
