batg4 wrote:Thanks everyone for your input. It looks like I will be re-checking my alignment and leveling my tubes. When I originally aligned the tables I just couldn't get it as close as I wanted it, but I never checked the tubes for level, so if I do that then maybe I can get the tables aligned. I've got my fingers crossed.
I think the 520 will fix your problems. First look at the 510 the tubes are held in the table rails but pressure from the side. The tube can be high or low in the rail. For example you have the tube in the main table and for whatever reason when you tightened the tube it was in the high position. Now you use the aux table or a floating table and when you tighten them down on the tube they are in a low position. You can have a mismatch on your tables of 1/4 inch.
Now look at the 520 the tube is tighten from the bottom. Thus when you put in in the main table the tube is pushed to the top of the rail and locked. Now mount a floating table or aux table again when you tighten the tube, it is pushed to the top of the rail. If the rail are the same height which they are they send you a gauge to make them this way. Your tables will be exactly the same height.
On my 510 it would drive me crazy trying to get the main table, floating table and aux table all adjusted to the same height so the fence would float over them and lock straight. Now on the 520 the problem is totally gone.
I personally think Shopsmith should discountinue the 510 upgrage and only offer the 520 it is that much better.