LCT V3 gearbox is a drop in, the other drop in V3 I would recommend is the VFC (Vega Force Co.) V3 gearbox.
LCT Front Wire: http://www.airsoftparts.ca/store2/in...oducts_id=2191
LCT Rear Wire: http://www.airsoftparts.ca/store2/in...oducts_id=2192
The VFC V3 gearbox, AirsoftGear.ca has them in their store but it's not online. ~$150 for the V3 drop in gearbox IIRC. Between the two you can't really go wrong with either. They're both Taiwanese made and pretty high quality. Haven't seen an LCT yet but the VFC should give you no problems.
As for the other parts, no problem.