How good is a sub ?100 3d printer ?

[curious aardvark]

cheers - frame looks identical - so the parts should fit.

I can see what you mean about the orientation of the filament spool. that's a fairly easy fix, but can wait for the moment.

Although if it were printing to height, then there wouldn't be an issue. At the moment I tend to put the z axis at the top at the end of a print and that does give a long length, but if it were printing and going up slowly, there wouldn't be a problem. Plus I'd need to move the screen - which I can't be arsed to do :-)

um, 7 - 10 stepper motors for a single extruder i3 ?
why ?
Okay, re-read the post. So a motor at each end of a belt. What benefits would that give ?
If the motor weren't perfectly in sync it would cause more hassle that you might save. You'd need to make sure that all the wires to the paired motors were identical lengths. Okay electricity passes pretty quickly through wire, but it's a measurable speed and you don't need much difference to effect a print.
I guess if you had a very large printer, it would reduce strain on the belts and pulleys - but can't see any other reason.