During the past 2 months I have made good progress.
Once all the functions were in place it was time to organize the upper. Luckily there is some space, because the motors take very little space. And I have space for a battery, which will power both the upper and the carrier.
I created two different setups for one transmitter/receiver and it seems to work!!!!
The receiver will be housed in the counterweight.
Next is fitting all the RC bits efficiently in the upper and finish the covers, then I will build the cab.
Kerst