I'm not necessarily advising OP to swap keyswitches. I don't think that's a hot-swap keyboard, and they expressed no desire to solder.

I do, however think researching the switches available in factory or built-to-order keyboards could lead to better results. In this case, mimicking the feel of a Thinkpad T60 calls for something with a strong tactile bump and shorter travel than most mechanical keyswitches. O-rings can shorten travel.

I, too like the T60 keyboard enough that I built a Tex Shinobi with Durock Koala switches, which have a strong, early tactile bump that's a lot like the feel of the T60. I don't mind the longer travel or some clacking, so I haven't used any lube or O-rings.