Blade 350QX Bigger Battery tray for Turnigy Nano-tech 4000mah 3S
Mounted with 6pcs M3 screw in original battery tray mounting hole.
You need to cut some in the upper part of the 350QX chassis.
And drill a hole for the main boards battery cable, so they will come out beside the switch.
For mounting you need:
4pcs of (MFS) Countersunk M3x10
2pcs of (MFS) Countersunk M3x12
2pcs M3 lock nut
The Battery max size that will fit are: 136x44x30mm