I built 2 Tiger 60 Deluxe kits at once. These two were actually number 2 and 3 as the first one went down in a mid air with a trainer.
The construction is straight forward as previously mentioned. All three of the kits I built needed no additional weight to balance them. Make sure you have good joint match ups before glueing parts together and it will be light and strong.
As previously mentioned, they fly great.

Enjoy!