Zippy is one of the companies that has supplied Happ since they left Cherry.  These 20g maximum operating force microswitches are the exact ones you will find others selling for a lot more.  With almost no audible click, these will lighten the force you need to apply while providing excellent response.

We put our numbers out there, front and center, NO FUZZY MATH!  This way you can compare and understand the different forces seen with micro switches.  Most Chinese standard buttons will use 125g which are just too hard for good play, look for people who report the weights to help you buy the right micro for your machine.