Comments.
In terms of wiping FT lifters/lobes, there is no benefit switching to a sol lifter. This assumes the same brand of lifter is used. The problems are in the metallurgy of the lifter &/or the machining/accuracy of the lifter base that contacts the lobe. It can be just as bad for each type.
Switching from a HFT to a SFT & how to approximate the duration change. It depends on the lash amount. For a tight lash cam, you add 8*. For a wide lash like some of the MP cams that had 028/032 lash, you add 15*.