& here's my effort.... Please excuse the cut & paste (real cut & paste no less!) of the mock-up, but have no idea how to render it as a computer image, so produced this image via photos of tubes etc & cut/shaded it to (hopefully) work & give you a flavour of the finished version.
OK, whats it all about? Well, here goes...
Now, I've never been a fan of point & pretend... I mean think, Sonics.

Even as a kid I got frustrated when Pertwee & Baker didn't have setting on the classic prop, so with mine hopefully I have rectified that.
There are two dials at the end of the Sonic, both with 6 settings (echoing the 6 sides of the console) that can be used in a variety of combinations. Maxim is 36 with neck retracted & another 36 with it extended. That's a whopping 72 settings!
The neck is spring loaded & released by a heavy touch of the button inside of the raised edged ID thumb panel. Normal pressure Switches the Sonic on in both modes. The button fits into the cradle of the panel so to look invisible.
The main body section is telescopic, if you pull it open it reveals a mini read-out, touch screen on one side, & a speaker grills with copper button on the other.
The speaker is for the communicator. In S6 the Doctor uses a gadget to talk to his companions a few times, I like this idea & have included in this Sonic. Something the 3rd Doctor could have done with in his UNIT days! to activate it, press the neck back into position, pull open the main body to reveal the speaker, extend the aerial, press the copper on/off button, turn the Sonic upside-down & talk into the Red emitter... & there you have it, a Sonic communicator!
To over-hear a transmission hold down the copper button for 3 seconds. Once the communicator is switched on, in either mode, the dials disconnect from their usual functions & can now be used to tune in & boost the Sonic's communicator frequency. (OK so make that 73 uses for the dials).
The Aerial: This is located under the 2nd dial. Pull it out for communication. In its extended mode it can perform a variety of tasks, such as when pressed against a safe, or computer it will download info or combinations. Or for a full medical scan, stick it in someone's ear. All of these downloads & reports are then transferred onto the mini screen inside the telescopic section, which is read landscape (not held up vertically like 11th Doctor does on his current model).
Now as the Dr likes to tinker with things, I have designed this sonic to come apart in 4 sections so he can add & upgrade sections whenever he likes (don't know how practical this would be in the real life tooling of the piece though).
Section one unscrews at the top collar, so he can change the neck & emitter. Section 2 unscrews at the main body before the mini speakers/LED screen & by unscrewing the brass ring, this releases the telescopic speaker/screen section. (to separate it from the copper ring it would have to be pushed through it). Section 3 unscrews at the copper ring to help release the tube as above. The final section is after the dials & this is were to small aerial is housed. On the diagram I have marked them as ABC&D.
Oh yeah one last thing on the functions, this Sonic Screwdriver also does not do wood!
The look is heavily influenced by the Classic Sonic & Anti-matter detector as seen in The Three Doctors. To complete the 'classic look', I imagine it as highly polished or a chrome type of finish, similar to the 2nd Drs Screwdriver. (See picture of my cobbled together build) However if you look closely you can see minor influences from all the versions of the Sonic to date. The dials echo the end section of 9&10th, the copper bits a nod to the 8th & the extension & readouts of 11th, but really this is the type of sonic that I'd like hence all the extra settings etc.
Various versions of this has been kicking about in my head for years now & this competition has finally got me off my butt & on to the drawing-board, so thanks for that.
Hope you all like it & if you have any questions please do ask!.