If Burkit is unsure, nobody knows 100%.
Yep, me neither. Might be a discontinued dial for the knob, or it might be a simple black washer under the knob. That’s the theory I subscribe to, myself.
Yeaaah… As far as we know, the trap from the Sedgewick scene didn’t have a separate cartridge. Case in point: did the prop makers really went through the trouble of making a plug for the electronics in a cartridge trap? Don’t think so. Methinks that the cartridge trap didn’t even have electronics, and that the Sedgewick trap didn’t have a removable cartridge.
As for the accuracy of the knobs, it’s a real big mess; especially with the several hero traps for GB1 (that may or may not have been retrofitted for GB2) It’s mostly guesswork at this point.
Cyland Props actually supplied me with those.. so I’d say they are right.
Okeydokey. I was asking because they’re EXACTLY the same as on the trap in the reference section, but they’re not the same as the ones in the screen-caps. Just wanting to makes sense of it all (I did bought a set, after all :P)
rips front plate dials off hero build and starts over
OK lets see if I can straighten this out:
The GB1/GB2 trap seen in the referance section as well as the PH DC trap has the second movie trap knobs added , it seems that the GB1 traps just had the knobs glued on. I have photo with a trap in it and all the front knobs are missing and all you can see is glue rings around where the knobs were.
Another strange note is that the side plates on the GB1 traps only had bolts on the hero version, the stunt/ background version had no screws holding the plates on.
The tear drop knobs did come with the “dial” or “skirt” and they have a line on the face, I have one that Keith Marshall sent me years ago. I’ve just bought a whole lot of the tear drop knobs and matching amounts of the plain knobs with dial and machined the dials loose so I can attach them to the tear drops.
Wow this is a sticky wicket, no they are not the correct ones but are a very good correct sized close match.
Keith still Ghostbusting?
I still have the caricature I made of him eons ago… Actually, I still have yours too!
This must have been some…ten years ago that he sent it to me.
Soooo.. when should I be checking ‘For Sale’ for a knob thread?
Also, would you happen to have any better shots of the silver front knob from the ballroom scene? I see it sneaking around up in the corner of one of those pictures. 
Sale thread is up now http://www.gbfans.com/community/viewtopic.php?f=31&t=22381
Silver knob? I’m not sure that those are the correct ones, that one is from Battlestar Galactica but I think one of it’s brothers is the correct ones.
These are the dials ive been selling copies of for a while now. If they are the correct ones they must have painted the black circle and silver ring on the tips…
And where did you get those, if you don’t mind? 
A very naughty banned member named Ddevil192. He sold me a set of dials a long time ago, when I was first getting into casting and selling parts. I have no idea where he got them from. Sorry.
And he was banned for not mailing out half of what he sold… to like 10 people.
First off the black knob is much smaller here’s what I believe is it’s short brother:
Ah yes, looking at the sreen shots I see what you mean. Also the silver knob seems to be smooth on the sides. Look like both my dials are inaccurate.
See what I see?
Middle of the dial kept silver?
A stunt trap?
Knob is missing, bolt that was holding said knob is exposed?