Logosol M8 - Manual (Page 28)

The upper edge
The easiest way to get the top even
and the edges round or bevelled, is to
use the belt sander. This is the method
we first recommend.
Many people build a 16-sided top seat
which, of course is even more elegant.
It is, however, hard to keep such a
construction neat, since the hot tub
constantly moves. The pieces must
be joined together and should only be
screwed to one or a couple of points
on the hot tub.
Stove