Actually don't use WD-40 as it will absorb moisture over time and cause rust. You want to make sure the bearings of your engine are well coated with after run oil (automatic transmission fluid, Marvel Mystery Oil, etc.). Put some down the glow plug hole, and some in the carb, and then turn the engine over to get the oil to the bearings. Watch how you put the oil in the carb as some engine manufacturers say not to put after run oil in the carb as it can deteriorate the o-ring. I've personally not had a problem with this, but just a cautionary reminder.

For the radio batteries, there are many theories about this, so who knows which is best. I tend to leave mine in and cycle them on my Triton cycler once a month to keep them conditioned. But I also fly during the winter so I want my planes ready to go.

Hogflyer