  In a previous article published in Phys. Rev. C 94 (2016) 014309 we have
shown for the first time that the best dynamical trajectory during the
deformation toward fission of the superheavy nucleus $^{286}$Fl is a linearly
increasing radius of the light fragment, $R_2$. This macroscopic-microscopic
result reminds us about the $\alpha $ or cluster preformation at the nuclear
surface, assumed already in 1928, and proved microscopically many times. This
time we give more detailed arguments for the neighboring nucleus $^{282}$Cn.
Also similar figures are presented for heavy nuclei $^{240}$Pu and $^{252}$Cf.
The deep minimum of total deformation energy near the surface is shown for the
first time as a strong argument for cluster preformation.
