Hi, years ago, I bought BeloLab2500 with two coloured loudspeaker cover sets. One cover set was put on, of course. Now I wanted to replace them in order to change to the new, unused cover set. Unfortunately, I cannot find an instruction how to do it. Looks like I don't have the complete manuals any more... I hope someone of you still uses BeloLab 2500 and might be able to give a tip how to remove them without any violation to the loudspeakers...; many thanks in advance.