According to The Wand Company website, the Sonic Screwdriver has the following dimensions: Length: 221 mm, Max Diameter: 30 mm, Weight: 218 g.

I don't have my Sonic Screwdriver yet, so I can't get the exact diameter of the space inside that I'll have to worth with. Although, I read on a Doctor Who prop modification forum thread that The Wand Company has fantastic support, so I'm considering on emailing them for the information.

In the mean time, I've been trying to figure out the best way to layout the PCB(s) for the Sonic. I quickly drew up some simple, crude, and not impressive layouts.

The first, probably most common, layout that popped into my mind was just a single, possibly double sided, PCB that ran down the middle of the Sonic.

Pros: Simple. Cons: Not very modular. (I swear I had more pros and cons thought up, but I can't remember any of them. Probably because I haven't slept yet.)

For the second layout, I tried to think of a way to maximize PCB area, and make the layout more modular so it would be easier to replace damaged parts or upgrade the Sonic. The idea that popped out is basically like the motherboard for a PC. There would be a single PCB with evenly spaced rectangular connectors like steps on a ladder. Then you would take your other PCB "chips" and slot them in like how you slot RAM into a motherboard. Octagon shaped PCB chips might be the best way to go to maximize surface area.

Pros: Modular. Cons: More complex. Possibility that PCB "chips" could become unseated from rough handling of the Sonic. Small surface area per chip.

I wanted to go further in discussing the viability of the second design, and also layout my ideas for the layout of the transceiver cluster at the tip of the Sonic Screwdriver, but I think I've been up for over 20 hours now and feel like taking a nap. I'll edit and finish this log later.

Many many hours later...

Okay, so for my third layout I decided to go with a hybrid of the first two. Motherboard PCB with evenly space horizontal rectangular connectors, and PCB chips would slot in like how you would install RAM.

Pros: Modular, large surface area, Cons: Not as modular as previous design, greater probability that a PCB chip could dislodge,

Gotta bounce so until next time.