Let me preface by stating that I don't have either a folder or an S&S equipped bike.
It seems that if you could stop the process of having the S&S couplers from going into your new bike at this point that yopu would want to consider a few factors.
What is the price of having the S&S couplers put in vs the cost of owning your folding bike of choice?
What disadvantages are there to having the S&S couplers installed vs the advantages?

I have found with other products that if I try to combine things, sometimes I get a less desirable product ie: a clock radio/toaster oven/can opener that doesn't keep accurate time, doesn't have good speakers, makes OK toast but leaves sharp edges on cans.

If you could have a folder always ready for travel and your Sakkit always ready local use, would that be better?