as far as balance, i moved my cg back to alomost 5&7/8, and is still needs a bit of donw while inverted and lands easy, so you can take your weight off the front i would say, i may move mine back even further soon, my battery is against the former at the back of the wing area, so to go any further i need to cut the covering and slide it in the fuse, i may stick some weight 1st on the back to see if i like it, then cut the covering...wouldnt be the 1st time i have done that
and hovering, not sure who else had this situation, but my 1st few attempts to go vertical, i quickly realized it needed down and right thrust, so i added washers behind 3 of the 4 motor mount bolts, helped, still could use a tad of right i think though, but let me know if yours does that, it went left and towards the canopy in the begining...didnt notice it on take offs, just going vertical..