issue with my 904

i just rebuild my 904 and got it put back into the car.. dad took it for a run and it ran good but the shifts where soft. didnt notice a kick down shift he wasnt paying attention for it.. now im going to take it for a run to see how it shifts and kicks down and listen for flare myself. if everything feels fine for the shifts and no flare y would the shifts be soft.. i put a TF-2 shift kit in it. could it be i need to screw in the PR a little and not have a flush like said in the instructions? forgot to readjust the kickdown cable and its not adjusted propperly.. would it being to lost be the issue for a soft ****?