does anyone know how to do the foam insert IPD hack for the index? I have a 72 or 73 IPD, so the 70 IPD max for the index is too small for me. II googled it and saw some posts about how you can shove a piece of foam between the lenses to get an extra 1.5mm, but some people said that you have to put it in just the right way or it tilts the lens tubes and causes a canting error (I don't know what that is)

I tried to shove a piece of foam between it and it actually feels a lot better. Is this a long term solution or will it break the spring overtime?