not familiar with the montecs but had the same problems with my muzzys..5 inch left and sumtimes low just like you...first i found my arrows were underspined so i bought some 2413 xx75's but still they werent shooting like my field points...people tried to teach my how to "tune them in" wich you can learn on the easton site but instead i went to gander mountain bought expandables and they hit dead center along with my fieldpoints...if i were you i'd switch back to mech. because all this tuning stuff frustrated me and i'm sure it'll frustrate you.... in my opinion get mechanicals that fly like your field points and you should be set..... GOOD LUCK