I have a suggestion for double-sided tape that is very strong AND easy to remove! At work, we call it the "green tape," but of course, it has a real name... The last time the tape showed its strength was when two men tried to remove a 70 cm podium, which took a while, and then we "rolled" the tape off the stone floor without a mark. We use the tape in the museum industry, where it's very important not to damage the existing setup since we constantly change exhibitions... If you're interested, I can look it up for you!