Have you wonder why you did a loop, roll and it goes off axis?
Most likely, your surface deflections are not the same value. If you want to be a smooth pilot, the same counts.
Many pilots just measure with a ruler or something and close is close enough.
Wrong, it need to be very accurate.
So buy something to measure the angles accurately. It ranges from electronic to manual, depending on what you want to spend.
But here are the steps you should follow.

1) Set ATV to max. Also set 100% for Dual/rate screen. Set expo to 0%.
2) Set subtrim to zero.
3) Install servo arm so it is 90 degrees to motion.
4) If not, move subtrim in transmitter so servo arm is 90 degrees. Now, adjust control surface so it is neutral position. For instance(elevons), if elevator motion does not match travel on both sides because one is off, out of axis you go.
5) Now, check full deflection. Put your device on it, check both sides and see if angle is the same. If not, adjust your ATV until the deflection is the same. Now reverse your control stick and do the same process.
6) Do all your surface controls and "dollars to doughnuts" your flying will be better.

Here is a cheap device to check accuracy of your angle. Sorry, don't know the name of it.
angular deflections 001.JPG 
Use this on canards.
This one used for ailerons.
angular deflections 003.JPG 

Just rotate the device and you can measure the opposite side to see if aileron is the same.
Finally, adjust your expo and dual rates and your ready to go.

Spend the time, effort, and energy and it will show in your flying skills.
I like to design and fly unique planes.
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good info
aaaaaannnnnd there's the tree
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Most kits comes with a little thing of maroo (small piece of balsa with
the angle cutted as a guide).lmao
This way you can adjust your throw according to specs more accurate.

I know some plans say 1 1/2 throw...but from were?lmao

If I cutted out the vertical fins slots a little off...Im screwed, especially if
there's no rudder.

You can never trust you eyes. A simple string and a piece of tape ( marking distance)
to verify that all you're wings, fins are aligned or have the same measurements. will do.

When cutting out parts...makesure you sand wings, fins, stabs...ect
to be exactly the same...(Hence, that's why they sell layer cut kits.)
Tape them together and sand them identical.

You set up everything manually first as if you don't have a computerized radio.
You want to work out all the mechanical settings first.

You set up 90 and 90 but you also must makesure the holes for the control
horns must also be even with the hinge line.

Even if you get proper throw settings...if the control rods you're using flex, bow..ect
You'll get less throw from that side (servo in pushing position). All you have to
do is press down on the control surface to notice the difference.
(That's why some people go push/pull set ups.)
It also makes the little thing of maloo a waste of time because the amount
of pressure apply to the control surface vary in conjuction of how much
air flow is moving over them..in other words SPEED.
I minimized it as best I can.
But if you know this...you're not going trip out. You simply yank on the stick a little
harder on the side that pitch,yaw or roll less.

Plus you'll also notice cheap servo dosnt always return to center...unless you bump
it the opposite directions.

You'll get play when just using Z bends into the servo arms or control horns.
There's parts you can get to eliminate that.

I bevel all my LE or/and make other surfaces as aerodynamic as I can.

I also mount most of my EQ as close to the CG as much as I can
(center of mass)...you'll be amaze how much a brick will glide when you do this.
It also elimates having to add on lead weight.

I use to fly lots of nitro. Im used to constantly adjust the trim during flight
because of changing fuel level. But to trim a poorly built model is ridiculous.

Practice doing a 4 point roll...if you can master that. You might know how to fly.lmao
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Great advice here - thanks for the tip.
Any other advice on how to "dial in" your 100kmph lawn dart?
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