If I was without a sander now, and didn't own a lathe ...
That's what I would get instead, as you could easily make a plate for those self adhesive sandpaper discs
The fact is that unless you get a really heavy one, it more than likely will suffer the same issues with deflection,
which my 6" belt 9" disc Axi generic design one has.
Example...
If I had to quickly put a square 90' edge on a random, dirty piece of building site timber, on the fly on a site, say
a wall stud for instance...
I would have to keep flipping the timber, regardless if it were a perfectly squared, S4S piece of timber,
and then, using the belt drum, make the middle slightly concave to counter this.
It is inaccurate, a load of faff, and the discs wear out quickly, the table is small with a poxy aluminium fence,
although the problem lies with the disc deflecting.
Not to mention that the dust from it is serious, if you don't just intend for it to be a seldom used tool,
you would need to be pulling a whopping amount of airflow to be using one often....like 3HP induction motor cyclone.
If you plan to be using it much.
I would sooner a low angle plane of some description, and a custom shooting board.
If you plan on using it for timber and metal, without taking it apart
I hope you have a reciprocating saw handy #-o
I was very surprised to find out these things aren't really designed to be maintained
My flimsy drive belt is probably close to giving up also.
In my opinion these things are a fire hazard, it doesn't take hardly anything to catch on fire...
like grinding a bevel on a chisel is enough to light it up inside where you can't clean!!!
This smouldering can go undetected, but is very resistant to be put out at the same time...
you think you cleaned it out (with a stick poking it out), only to see the thing smouldering again later!
It is very persistent and the smell of plastic on top of it will choke you, while your trying to dismantle it (hammer)
That's my two cents on these generic design belt disc sanders...
Get a lathe instead
Tom