Hi! Editor for SKR here!!!
first, let me tell you that your basic cleaning is good and could be used for work but some part can be made better. for me, you're in and can start "work"
basic cleaning: good leveling and basic cleaning
p01: need -0,4° of tilting. use free transform tool (ctrl+T) on your duplicated layer for that.
p02: need -0,3° of tilting. missed a bit of cropping on top.
p03: need -0,1° of tilting. missed a bit of cropping at the botom. maybe a bit too dark
redrawing: good basic redraw and page positioning
p40: nothing much, maybe the hand would have been a bit better by copying the one o the yakuza in front and using it as base. + cropping
p56: the action line could fit the original extremities better texture wise, some need to be thined when nearing the extremities . use clone tool to reproduce the ground design in the bottom center area. + cropping
of course for some other project with harder artwork then more thing would be needed but for those it'll be good after fixing the point that I pointed out (if you really want to make it better)
if you want to know what is done on manga like Sun Ken Rock, look here :
http://www.xscansx.com/t1682-sun-ken-rock-how-to-edit