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Three sets [or any number you like] of seven[or any number you like]
frames won't do anything for your manual tracking skills, because firstly,little
or no star elongation will show at 3.2 seconds whether you guide or not.
The only way to manually guide is to use a reticle eyepiece. Pick a
reasonably bright star, defocus it until it fully occupies one of the circles
in the eyepiece, open your camera shutter for at least 30 seconds,
[preferably longer] and try using the manual controls to keep the large
defocussed star precisely centred in the eyepiece reticle. When you start guiding for minutes, not seconds, it quickly becomes tedious.
The chances of a basic motorised mount failing are remote, and a used one
could be found cheaply in the classifieds here. Choose one that can be manually controlled if necessary. If you don't want to fork out for equipment you are in the wrong hobby. At the very least you will have to get an illuminated reticle eyepiece.
raymo
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