Thanks Jim. Yeah I saw that a day or so ago but it looks a bit worn for the starting price he's asking for it. I almost had a 75A on eBay but my session froze and I missed it, and I was going to bid higher than the winning bid! Oh well, no sense crying about it, just move on.
So besides Yaesu and Diamond, there really is only one other company producing screwdriver antennas right now and that is Scorpion. Hi-Q is changing ownership and Tarheel is so far behind that customers like me are seeking alternative solutions, like the Atas-120A. It certainly isn't my first choice but as I stated before I just don't feel like spending so much money on a Scorpion, having just retired. Any of the larger screwdrivers require very sturdy mounting; such platforms are not native to these crossovers as evidenced by the galleries hosted by the screwdriver manufacturers. The lion share of the larger mobile antenna installations are on trucks, full-sized SUV's, Jeeps, military Humvee's (and civilian), tanks and subs. I guess I can't get out of my mind the image from my childhood of seeing the Flintstones sitting in their "stone car" tipping over when an oversized rack of ribs is placed on the door at the drive-thru. That would be me with a SA-680 lopsided crossover blown off the freeway by a passing semi.
As I said, I'm reluctantly moving in the direction of the Atas-120A, mostly because the suppliers of the mid-range screwdrivers are either dealing with the impact of changes to their business, or they've folded up. Since I like to tinker, I've worked out from a high level what it would take to fabricate such an antenna DIY. Using a stepper motor with a PWM controller or even a linear actuator would get someone down the road quite a ways, especially with the ubiquitous Arduino, Raspberry Pi's, and SBC's around. Such an eventually is certain in my opinion, especially when hams can't get the products they need.
Anyway, I'm sorting out how to hard mount an Atas and still lay it down so I can use the garage.
Glen - KE7FD