So do you use your right or left thumb to press down the spacebar?

Let's see. I'm going to type out a few... never mind, I used my right thumb for all of these spaces.

I also taught myself how to type. My hands and fingers flow freely around the keys. That is probably the reason I haven't been afflicted by CTS yet; no stress or pressure. I can easily approach 100WPM when I'm on a roll and typing directly from my mind. The kind of keyboard I'm using has a big effect on my speed, though. I cannot type nearly as quickly on this laptop keyboard as I can on a good rock-solid full-size keyboard. I never need to look at the keys.

Jam it back in, in the dark.