The Thunder Tiger Raptor 90 aluminum boom comes stock at 815mm. This is a tad bit too long for the 385XL belt so you will have to dremel off one of the ends. I cut off the end with the slits in it since that is the weaker side of the boom...your choice.
10mm should do the trick. Keep in mind, if you order the carbon boom, it is only 814mm so you may need to take off a little less material. I know, it's only a 1mm difference, but you don't want to take off too much. It just needs to clear the "aluminum lever holder" screw (as shown below) and leave enough excess to adjust your belt tension. Take out the stock boom/belt and replace them with the newly modified boom and the 385XL belt.
Now you need to make a longer tail push rod so that you can center your tail pitch slider when your servo is centered. I just picked up a 4mm carbon rod from my local kite dealer and cut it to length. You could probably order a pre-made rod from another manufacture, this is just the way I did it. Mine ended up being 755mm when all is said and done. You'll need to make sure that you cut it slightly shorter than needed so that the ball link end can be adjusted in and out. You need to make sure you are able center your pitch slider correctly. When you've found the correct length, just epoxy the threaded rods into each end and allow to dry overnight. Put your ball link ends on and adjust accordingly.
I also picked up two 5mm carbon rods for tail boom supports. You do not have to do this step, I just wanted the helicopter to look proportional. I simply cut the new carbon rods 90mm longer than the stock ones, since the blades are 90mm longer. Mine ended up being 610mm each, yours may differ depending on the look your going for.
I was even using the same motor that I had in the Logo 600 (Hacker A50-14s) for a while until I decided to go for more power. I am now running a Scorpion 4035-560 motor and am loving the results...much more power and headspeed-holding ability. It also runs a lot cooler, and I am not easy on it either. I like to run the Logo 700 at 2100 rpm's, that seems to be the sweet-spot for me, but everyone has their own opinion on what they like.
At this point, you are pretty much done. Just install your new massive main rotor blades and go out and have some real RC helicopter flying fun. Just check out the video here.
p.s. - After some time flying the 700 I found out the hard way that running these larger main/tail blades (690mm/105mm) is very taxing on the stock Mikado tail grip arms. I would HIGHLY recommend changing them out with some stronger ones...it will save you money in the end.
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