Those rear control rods i used a zip tie to pull them together thus eliminating any bowing and then just painted over the zip ties and you can even see them. As far as the upward climb rate you must be aware the all under slung engines meaning under the wing will naturally give it a strong upward thrust. You must Counter this by static down elevator setting for Neutral Position.

I know this is and old vid and you may have figured things out since then but I think the batteries were warm because the motor is drawing a lot of amps for what the battery is capable of. Those dreaded Chinese guys thought it would be funny to put a 25c requirement on the box. But if you do the math.. a 4000 x 25c divided by 1000 will give you 100 amps that it can safely provide. Two ESCS with a 60 amp draw add up to a 120... 20 over than what the battery can give up.. so yeah, it's best to go with a 40c or higher lipo...

4500mah 4s all the way forward gets me a 110mm CG every time

Good call bro. yeah I use the admiral pro 5000 60c. works perfectly. my landing gear is wobbly as well we're you able to get those tighten some how?

Ccg has no bearing on control tunes being glued to fuselage. It's about forward and aft weight in relation to thee cg position. Keep aging weight. Or fly it a bit tail heavy. Out of control climb