Grizzly 18" sander
I have the Grizzly G0458 open sander. I have used it on short 2" x 4" pieces, and up to 6" x 6" x 12ft timber. I did a test seat platform glue up and it leveled up my poorly glued up 2" x 6"s nicely. It does produce a nice surface with the supplied sand paper. I haven't changed the drum sand paper yet.
However, tracking the drive conveyor belt, takes a bit of time for me. I just watch it and adjust accordingly.
Sanding 4 pieces of 9" long 2" x 4"s, I would try to keep at least one piece under the sanding roll to eliminate snipe. But one caught the outfeed side of the housing and tore the drive paper. I haven't had the chance to talk to Grizzly about this, maybe this was operator error.
Other then those two items, I like the unit and will be using it more on the chairs I need to make.
I picked mine up at the PA warehouse. The fork lift operator was able to load it in the side door of my van with an inch on both sides. (I also attached the stand to the sander unit while it was still in the van. Way much easier tipping it upright from the van height than from the floor like the manual says.)
Good luck with your purchase.
Jon