I did the same on my BK-7, but not on the others.
CAUTION CAUTION CAUTION!!! The most important thing is to COVER THE BLADE SECURELY. H2O helps, but regardless you will be putting a lot of effort into stretching this over the blade.
Especially when trying to put a long piece on the handle, it helps to remove the scales and slip(?) the intertube over one scale and then the other. Then work it back on the knife and when it's in place, roll the rubber until you can access the screws on one end, then unroll and repeat on the other end.
Hope this helps some others. I spent time and blood figuring out the technique of removing the scales to get the intertube stretched over the scales.