Seems to be a lot of unnecessary heavy work here.
I saw the post about the DSPIAE tool somebody posted, but on inspection it seemed a lot dearer, heavier and unsuitable than the cheapo ebay grinder/drill tools I use.
As mentioned above, the model 201 is a dream to use, featherlight in weight, 15cm long to chuck, and with three variable speeds. I also have a model 202, which is a bit heavier and allows 5 speeds and is 16cm long.
Both drills come with multiple alternative chucks to accommodate pretty well all of the small drill bits I will use. Both have run perfectly true since I got them.
I tend to keep a 0.3 bit permanently in the 201, but vary larger drills in the 202 as required.
See pic below, which shows the box of accessories they come with.
Much easer than the DSP... thingie!
Why make life more complicated than it need be?
Sandy