I wasn't going to pick up the spring initially because increased resistance moving the shifter over to 5th did not sound fun, but if I could shorten that distance, I am on board for a spring as well to round out the whole package.
Hence the question. I have a Type R shifter + most of what Acuity has to offer ready to go into the Si, but I will wait for this so I can install it on the assembly before it goes in.