@TonyTib: Since I don't tend to use power tools a lot, I've been mostly buying corded tools: they give lots of power without having to worry about charging the battery or paying for Lithium batteries.
I'm 100% with you on this -- I don't think I have a single battery-operated tool -- it's not that I don't use the tools, but when I do so I'm in my garage, so power isn;t a problem. I guess that if I was on a building site doing thsi every day, I'd be more tempted to use battery-powered versions.
Last time I used a nibbling tool it had a squeeze handle. Powered now - cool!
There was a time when very small "hole saws", with 2 teeth, were used to manually cut about 1/8 inch diameter islands in copperclad pcb material for breadboarding. Don't know if they are still available.
@TonyTib....In the old days there was a company called EMCO that used to make the Unimat and Minimat lathes - pretty small, and my friend who had a big one said they were "toys" but they were decent quality and good for small work. They're no longer made, but you can find second hand ones, they command good prices. As you say, the chinese stuff has taken over, and some of them are not too bad.
You are right, a scroll saw is a handy thing, especially for unusual shaped holes, as is a jigsaw, and as I do have one of those that was a serious omission. I've used mine to make neat square holes in wooden cabinets for access to mains and data outlets that would otherwise be hidden.
Yes, I'd at least look into getting your old Dremel fixed. The current ones have plastic cases, and last time I looked on Amazon, a lot of people were unhappy with the quality.
If you can get time, you should do some research into desktop lathes and mills; last time I checked, there were plenty of internet resources, and the Chinese ones are relatively affordable (<$500-$1000). Of course, they have limited sizes, but a full size one does take up a lot of space.
Also, could you use a scroll saw for making holes? Another possibility is electric cutout tools.
Since I've used hand nibblers, I like the electric version; another option might be body saws ("designed for cutton car bodies and other metals").
@TonyTib... "I've been mostly buying corded tools.....My current rotary tools is a $20 Harbor Freight variable speed..." In my experience you can get a decent corded drill a lot lower down in the market range than a cordless drill. A decent Cordless drill will be expensive. but in view of your info about Dremel it might be worth my while to get my old (and I think good quality) Dremel tool fixed.
Milling machines...and lathes....good point. I have had 2 or 3 friends who have owned both (handy guys to know) and while I would love to have these tools I can't warrant the expense for the amount I would use them. They are like Microcontrollers - you are limited in what you can do with them only by your imagination.
Since I don't tend to use power tools a lot, I've been mostly buying corded tools: they give lots of power without having to worry about charging the battery or paying for Lithium batteries.
Dremel is now owned by Bosch, and I'm pretty sure all the Dremels have been made in Mexico for a while. My current rotary tools is a $20 Harbor Freight variable speed; it's decent quality, but is kind of big. If I wanted something expensive, I'd get a Proxxon; they're not a whole lot more than Dremels, they're made in Germany, and a friend who does woodworking says they're a lot nicer.
BTW, another way to make holes is to use a milling machine.
Hmmm...interesting...I like the set in first link in your post, but I can see that swivel arrangement in your third link would not be too robust. The thing I was thinking of is like the below - sorry I could not get the pic to post, just the link.. The drill has 2 chucks on a pivot and you turn the whole head to put one of the chucks in the driving position. Google "dual-drill" and you can get some videos. I have not heard any reports of this - good or bad - but it looks pretty handy. I was recently putting up screen mounts for a video conference installation and was successively drilling a hole and screwing in a holding screw - this would have been really handy.