My two cents worth, Pat and I have talked abou dihedral at length. on Semiscale ships, wherre the wing is low, the dihedral gets the vertical cg in the right place for trimming purposes. the Brodak P-40, also designed by Pat, also needs dihedral to trim properly. There are some that move the wing up it will basically accomplish the same purpose. HOWEVER, now it wont look right! I guess it depends on how you feel about the appearance of your finished plane as to the direction you go. Myself, the dihedral isnt any big deal to incorparate so I followed the designers reccomendations. besides that, a low winger with dihedral just looks cool! and any one who has flown any of Pats designs can attest to the fact that he has the knack for getting it right. The bellcrank mounted centered in the wing hasnt any impact on the situation except allowign a better installation . the leadouts will not have any problems negotiating the "turn" as they exit the tip. If you move the leadouts to the bottom of the tip, it will negate the purpose of the dihedral. the dihedral is ONLY there to get the LEADOUTS to a position that balances the vertical cg, put em in the center of the tip.
long story short,
1# leadouts centered in the wing, without question and use dihedral
2#dont move the wing, use the dihedral, it willnot be a hurricane if you move the wing!
for more on this, there is quite a dialog in the "arf" section on this forum. discussing the Brodak P-40, actually two threads on it. Pictures about how I put dihedral in the ARC wing. If you are building from scratch its way way easier
My vote, put the dihedral in leave the wing low.
just my thoughts