Not to be rude, but it's not all that hard to figure it out for yourself. Just find the weight for your motor, servo, esc, receiver ect. and make sure its as close to the weight of your battery and brake servo(if your using one). If you want to get really in depth, also take into consideration, the motor mount, the slightly greater amount of chassis on the battery side and the fact that the weight of the battery is slightly further away from the center of the chassis than the motor. This way you can test every set-up you can think of on your own.
Personally, I go by what Tekno has in the description of the buggy: Tekin system(as you mentioned) and a battery 500-600g. If you don't feel like doing all of these calculations, I believe with the most seemingly unbalanced setup on the EB48, you'll probably end up being as balanced as all of the other guys on the track.
For example: I'm pretty sure Austin Blair(without changing anything else) has gone between the two pro-tek 4100 packs(438g) and the big 6400 brick(653g) without any issues.