Check the main shaft is machined and not bent.
Might want to replace the main gear with the new one that has just came out ( http://www.fast-lad.co.uk/store/h25...20t-p-6523.html
Another support for the tail rod.
Cut a ball link with a knife, put in drill, make bore out all the holes a bit (youtube this, it's fairly simple). They are too tight, stock.
The hex driver it comes with is fine, just makes sure that you push it in all the way, it will go in a bit and you'll tthink you have pushed it in the screw all the way when you haven't.
Take out the bottom plane when you are doing wiring and putting in the gear.
Don't put the servos in until you've placed the motor in.
Read the instructions twice, then just think about building it. They are simple to follow, but the actual instructions are not great. I don't like the order they have about assembling things. I had to disassemble things, to assemble certain things correctly.
Cutting the bottom of the canopy was needed for me, for it to fit with the helicopter and a battery in place. Before we get lots of pictures posted such that I have to scroll a lot down the page - the stock canopy can fit. It's just a bit of hard work (failing that, look up canomod canopies).
I would say don't use the square tailblades. They cut the grass too much.
If you are using the stock, white blades to begin with (I would do that even if it's for the first two flights) then colour them red and black or something. I know you can use tracking tape but that adds weight.
The align batteries are ok, it's up to you if you want to spend more.
The tail pulleys are already metal, stock now.
I don't think you should add carbon fibre landing struts or something. I have heard some peoples ay they break easily, but if you strengthen them that's going to add a lot of stress further up the heli. They are really not expensive to replace, either.
Put screws in pure alcohol, mount the speed controller underneath not up front.
The wiring is actually simple but it took me a while to figure out how to do it neatly.
I know this is mostly about what to have replaced, from stock. Most of it's actually ok and the main part is building.
Put all the screws in alcohol.
I don't think you need -11 pitch in normal flight mode. I raised that a bit, it made landing a bit easier.