The tape is only wrapped around the threads of the post, not the splined bushing. The idea is to wrap enough tape around the post threads so it acts like the bushing holding the post in place and centred enough so it doesn't fall out, but secure enough that it can be used as a guide for tasks like neck alignment/angle and bridge placement or checking the height.The manual says to wrap them with tape and slide them in, but I am unable to get them pushed in with tape...
When it's time to install the bushings, they are friction fit, so some resistance is normal. They should not require any glue. They will indeed require tapping in with a small hammer (not a 3 lb sledge) and use a block of hardwood between the hammer and the bushing so you don't chip the plating or distort the metal.