TMCC crane & boom car

[eZAK]

I have a few questions about these cars and would like you opinions.

First; What do you do with the hooks when moving down the tracks?
I tried to keep them loose on the boom car but they get hung up at times when going around turns.

Second; Do you use the enclosed 'cab locking pins' when traveling?
Mine go into the channels on the cab ok but they don't fit the eyelets. The eyelet hole is too small. Any suggestions?

Third; Does anybody use a battery in the boom car?
What is the purpose of it?
When I installed mine the boom car makes a 'chirp' every 4 seconds!

Thank You!