UPDATE: Tom Frye kindly loaned me a spare Atlas switch machine of his, and I got some daylight today to test the CD switch board with it. Went quite well. I used 3300 uF caps in the board, and set 14VAC supply.
I found that less than 14 VAC the action was a bit sluggish and not consistent. My test 1044 transformer will only put out 15 VAC, and that was marginally better, but 14 VAC works satisfactorily.
The action with the Atlas switch I noted is quite different than a PW Lionel. Lionel switch coils are about 6.5 ohms, but the Atlas are about 29 ohms.
So the inrush throw current will be much lower for an Atlas. And instead of a snappy throw it is more of a slow steady movement from end to end, because the cap stays connected throughout. (As we said earlier there is no built in switch that disconnects the power part way through the stroke like most other switches use.) No matter; it gets the jobs done just fine.
I also noticed that since the cap is fully discharged after each throw, it does not get fully recharged if you make several throws quickly, and after 2 or 3 quick throws the subsequent throws are not fully completed. Makes perfect sense when you think about it.
I noted the 33R resistor maybe gets a little warm after several quick throws, but nothing of any concern in my opinion.
My conclusion is that minimum 14VAC works best with Atlas switches (as it does with Lionels), and for the minor cost difference I think I would use 3300 uF caps with Atlas switches (instead of 2200 suggested by Dale); and 4700 uF for two in tandem.
I can appreciate that for Atlas fans who are used to Atlas pushbutton switches, there may not be any attraction in switching to mini toggles. But for many of us who are used to “lever” type switch actuators, the mini toggles may seem more familiar and easier to use. And with this CD board there is no worry about coil burnout. 
Rod
